interface methods for specific SDP solvers More...

Typedefs
typedef struct SCIP_SDPiSolver	SCIP_SDPISOLVER

Functions
Miscellaneous Methods
EXTERN const char *	SCIPsdpiSolverGetSolverName (void)

EXTERN const char *	SCIPsdpiSolverGetSolverDesc (void)

EXTERN void *	SCIPsdpiSolverGetSolverPointer (SCIP_SDPISOLVER *sdpisolver)

SDPI Creation and Destruction Methods
EXTERN SCIP_RETCODE	SCIPsdpiSolverCreate (SCIP_SDPISOLVER *sdpisolver, SCIP_MESSAGEHDLR messagehdlr, BMS_BLKMEM *blkmem)

EXTERN SCIP_RETCODE	SCIPsdpiSolverFree (SCIP_SDPISOLVER **sdpisolver)

EXTERN SCIP_RETCODE	SCIPsdpiSolverIncreaseCounter (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_RETCODE	SCIPsdpiSolverResetCounter (SCIP_SDPISOLVER *sdpisolver)

Solving Methods
EXTERN SCIP_RETCODE	SCIPsdpiSolverLoadAndSolve (SCIP_SDPISOLVER sdpisolver, int nvars, SCIP_Real obj, SCIP_Real lb, SCIP_Real ub, int nsdpblocks, int sdpblocksizes, int sdpnblockvars, int sdpconstnnonz, int sdpconstnblocknonz, int sdpconstrow, int sdpconstcol, SCIP_Real sdpconstval, int sdpnnonz, int sdpnblockvarnonz, int sdpvar, int sdprow, int sdpcol, SCIP_Real sdpval, int indchanges, int nremovedinds, int blockindchanges, int nremovedblocks, int nlpcons, int noldlpcons, SCIP_Real lplhs, SCIP_Real lprhs, int rownactivevars, int lpnnonz, int lprow, int lpcol, SCIP_Real lpval, SCIP_Real *start)

EXTERN SCIP_RETCODE	SCIPsdpiSolverLoadAndSolveWithPenalty (SCIP_SDPISOLVER sdpisolver, SCIP_Real penaltyparam, SCIP_Bool withobj, SCIP_Bool rbound, int nvars, SCIP_Real obj, SCIP_Real lb, SCIP_Real ub, int nsdpblocks, int sdpblocksizes, int sdpnblockvars, int sdpconstnnonz, int sdpconstnblocknonz, int sdpconstrow, int sdpconstcol, SCIP_Real sdpconstval, int sdpnnonz, int sdpnblockvarnonz, int sdpvar, int sdprow, int sdpcol, SCIP_Real sdpval, int indchanges, int nremovedinds, int blockindchanges, int nremovedblocks, int nlpcons, int noldlpcons, SCIP_Real lplhs, SCIP_Real lprhs, int rownactivevars, int lpnnonz, int lprow, int lpcol, SCIP_Real lpval, SCIP_Real start, SCIP_Bool feasorig)

Solution Information Methods
EXTERN SCIP_Bool	SCIPsdpiSolverWasSolved (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverFeasibilityKnown (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetSolFeasibility (SCIP_SDPISOLVER sdpisolver, SCIP_Bool primalfeasible, SCIP_Bool *dualfeasible)

EXTERN SCIP_Bool	SCIPsdpiSolverIsPrimalUnbounded (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsPrimalInfeasible (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsPrimalFeasible (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsDualUnbounded (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsDualInfeasible (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsDualFeasible (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsConverged (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsObjlimExc (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsIterlimExc (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsTimelimExc (SCIP_SDPISOLVER *sdpisolver)

EXTERN int	SCIPsdpiSolverGetInternalStatus (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsOptimal (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsAcceptable (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_RETCODE	SCIPsdpiSolverIgnoreInstability (SCIP_SDPISOLVER sdpisolver, SCIP_Bool success)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetObjval (SCIP_SDPISOLVER sdpisolver, SCIP_Real objval)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetSol (SCIP_SDPISOLVER sdpisolver, SCIP_Real objval, SCIP_Real dualsol, int dualsollength)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetPrimalBoundVars (SCIP_SDPISOLVER sdpisolver, SCIP_Real lbvars, SCIP_Real ubvars, int arraylength)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetIterations (SCIP_SDPISOLVER sdpisolver, int iterations)

Numerical Methods
EXTERN SCIP_Real	SCIPsdpiSolverInfinity (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsInfinity (SCIP_SDPISOLVER *sdpisolver, SCIP_Real val)

EXTERN SCIP_Real	SCIPsdpiSolverMaxPenParam (SCIP_SDPISOLVER *sdpisolver)

EXTERN SCIP_Bool	SCIPsdpiSolverIsGEMaxPenParam (SCIP_SDPISOLVER *sdpisolver, SCIP_Real val)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetRealpar (SCIP_SDPISOLVER sdpisolver, SCIP_SDPPARAM type, SCIP_Real dval)

EXTERN SCIP_RETCODE	SCIPsdpiSolverSetRealpar (SCIP_SDPISOLVER *sdpisolver, SCIP_SDPPARAM type, SCIP_Real dval)

EXTERN SCIP_RETCODE	SCIPsdpiSolverGetIntpar (SCIP_SDPISOLVER sdpisolver, SCIP_SDPPARAM type, int ival)

EXTERN SCIP_RETCODE	SCIPsdpiSolverSetIntpar (SCIP_SDPISOLVER *sdpisolver, SCIP_SDPPARAM type, int ival)

File Interface Methods
EXTERN SCIP_RETCODE	SCIPsdpiSolverReadSDP (SCIP_SDPISOLVER sdpisolver, const char fname)

EXTERN SCIP_RETCODE	SCIPsdpiSolverWriteSDP (SCIP_SDPISOLVER sdpisolver, const char fname)

Detailed Description

interface methods for specific SDP solvers

Author: Marc Pfetsch; Leif Naundorf; Tristan Gally

This file specifies a generic SDP solver interface used by SCIP to create, modify, and solve semidefinite programs of the (dual) form

$\begin{eqnarray*} \min & & b^T y \\ \mbox{s.t.} & & \sum_{j=1}^n A_j^i y_j - A_0^i \succeq 0 \quad \forall i \leq m \\ & & Dy \geq d \\ & & l \leq y \leq u \end{eqnarray*}$

for symmetric matrices $A_j^i \in S_{k_i}$ , a matrix $D \in \mathbb{R}^{k_0 \times n}$ and query information about the solution.

All indexing (rows, columns, blocks and variables) starts at 0.

Although it includes a few SCIP header files, e.g., because it uses SCIP's return codes, it can be used independently of any SCIP instance.

Definition in file sdpisolver.h.

Typedef Documentation

typedef struct SCIP_SDPiSolver SCIP_SDPISOLVER

solver dependent SDP interface

Definition at line 71 of file sdpisolver.h.

Function Documentation

EXTERN const char* SCIPsdpiSolverGetSolverName ( void )

gets name and version (if available) of SDP solver

Definition at line 226 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiGetSolverName().

EXTERN const char* SCIPsdpiSolverGetSolverDesc ( void )

gets description of SDP solver (developer, webpage, ...)

Definition at line 234 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiGetSolverDesc().

EXTERN void* SCIPsdpiSolverGetSolverPointer ( SCIP_SDPISOLVER * sdpisolver )

gets pointer for SDP solver - use only with great care

The behavior of this function depends on the solver and its use is therefore only recommended if you really know what you are doing. In general, it returns a pointer to the SDP solver object.

Parameters

sdpisolver pointer to an SDP interface solver structure

Definition at line 248 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiGetSolverPointer().

EXTERN SCIP_RETCODE SCIPsdpiSolverCreate	(	SCIP_SDPISOLVER **	sdpisolver,
		SCIP_MESSAGEHDLR *	messagehdlr,
		BMS_BLKMEM *	blkmem
	)

creates an SDP problem object

Parameters

sdpisolver	pointer to an SDP interface solver structure
messagehdlr	message handler to use for printing messages, or NULL
blkmem	block memory

Definition at line 267 of file sdpisolver_dsdp.c.

References BMS_CALL, and SCIPsdpiSolverInfinity().

Referenced by SCIPsdpiClone(), and SCIPsdpiCreate().

EXTERN SCIP_RETCODE SCIPsdpiSolverFree ( SCIP_SDPISOLVER ** sdpisolver )

deletes an SDP problem object

Parameters

sdpisolver pointer to an SDP interface solver structure

Definition at line 308 of file sdpisolver_dsdp.c.

References DSDP_CALL.

Referenced by SCIPsdpiFree().

EXTERN SCIP_RETCODE SCIPsdpiSolverIncreaseCounter ( SCIP_SDPISOLVER * sdpisolver )

increases the SDP-Counter

Parameters

sdpisolver SDP interface solver structure

Definition at line 337 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiSolve().

EXTERN SCIP_RETCODE SCIPsdpiSolverResetCounter ( SCIP_SDPISOLVER * sdpisolver )

reset the SDP-Counter to zero

Parameters

sdpisolver SDP interface solver structure

Definition at line 349 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiClear().

EXTERN SCIP_RETCODE SCIPsdpiSolverLoadAndSolve	(	SCIP_SDPISOLVER *	sdpisolver,
		int	nvars,
		SCIP_Real *	obj,
		SCIP_Real *	lb,
		SCIP_Real *	ub,
		int	nsdpblocks,
		int *	sdpblocksizes,
		int *	sdpnblockvars,
		int	sdpconstnnonz,
		int *	sdpconstnblocknonz,
		int **	sdpconstrow,
		int **	sdpconstcol,
		SCIP_Real **	sdpconstval,
		int	sdpnnonz,
		int **	sdpnblockvarnonz,
		int **	sdpvar,
		int ***	sdprow,
		int ***	sdpcol,
		SCIP_Real ***	sdpval,
		int **	indchanges,
		int *	nremovedinds,
		int *	blockindchanges,
		int	nremovedblocks,
		int	nlpcons,
		int	noldlpcons,
		SCIP_Real *	lplhs,
		SCIP_Real *	lprhs,
		int *	lprownactivevars,
		int	lpnnonz,
		int *	lprow,
		int *	lpcol,
		SCIP_Real *	lpval,
		SCIP_Real *	start
	)

loads and solves an SDP

For the non-constant SDP- and the LP-part, the original arrays before fixings should be given, for the constant SDP-part the arrays AFTER fixings should be given. In addition, an array needs to be given, that for every block and every row/col index within that block either has value -1, meaning that this index should be deleted, or a non-negative integer stating the number of indices before it that are to be deleated, meaning that this index will be decreased by that number, in addition to that the total number of deleted indices for each block should be given. Optionally an array start may be given with a starting point for the solver (if this is NULL then the solver should start from scratch).

Warning: Depending on the solver, the given lp arrays might get sorted in their original position.

Parameters

sdpisolver	SDP interface solver structure
nvars	number of variables
obj	objective function values of variables
lb	lower bounds of variables
ub	upper bounds of variables
nsdpblocks	number of SDP-blocks
sdpblocksizes	sizes of the SDP-blocks (may be NULL if nsdpblocks = sdpconstnnonz = sdpnnonz = 0)
sdpnblockvars	number of variables that exist in each block
sdpconstnnonz	number of nonzero elements in the constant matrices of the SDP-Blocks AFTER FIXINGS
sdpconstnblocknonz	number of nonzeros for each variable in the constant part, also the i-th entry gives the number of entries of sdpconst row/col/val [i] AFTER FIXINGS
sdpconstrow	pointers to row-indices for each block AFTER FIXINGS
sdpconstcol	pointers to column-indices for each block AFTER FIXINGS
sdpconstval	pointers to the values of the nonzeros for each block AFTER FIXINGS
sdpnnonz	number of nonzero elements in the SDP-constraint matrix
sdpnblockvarnonz	entry [i][j] gives the number of nonzeros for block i and variable j, this is exactly the number of entries of sdp row/col/val [i][j]
sdpvar	sdpvar[i][j] gives the sdp-index of the j-th variable (according to the sorting for row/col/val) in the i-th block
sdprow	pointer to the row-indices for each block and variable
sdpcol	pointer to the column-indices for each block and variable
sdpval	values of SDP-constraint matrix entries (may be NULL if sdpnnonz = 0)
indchanges	changes needed to be done to the indices, if indchanges[block][nonz]=-1, then the index can be removed, otherwise it gives the number of indices removed before this
nremovedinds	the number of rows/cols to be fixed for each block
blockindchanges	block indizes will be modified by these, see indchanges
nremovedblocks	number of empty blocks that should be removed
nlpcons	number of active (at least two nonzeros) LP-constraints
noldlpcons	number of LP-constraints including those with less than two active nonzeros
lplhs	left hand sides of active LP rows after fixings (may be NULL if nlpcons = 0)
lprhs	right hand sides of active LP rows after fixings (may be NULL if nlpcons = 0)
lprownactivevars	number of active variables for each LP constraint
lpnnonz	number of nonzero elements in the LP-constraint matrix
lprow	row-index for each entry in lpval-array, might get sorted (may be NULL if lpnnonz = 0)
lpcol	column-index for each entry in lpval-array, might get sorted (may be NULL if lpnnonz = 0)
lpval	values of LP-constraint matrix entries, might get sorted (may be NULL if lpnnonz = 0)
start	NULL or a starting point for the solver, this should have length nvars

Definition at line 383 of file sdpisolver_dsdp.c.

References errorMessage(), and SCIPsdpiSolverLoadAndSolveWithPenalty().

Referenced by SCIPsdpiSolve().

EXTERN SCIP_RETCODE SCIPsdpiSolverLoadAndSolveWithPenalty	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real	penaltyparam,
		SCIP_Bool	withobj,
		SCIP_Bool	rbound,
		int	nvars,
		SCIP_Real *	obj,
		SCIP_Real *	lb,
		SCIP_Real *	ub,
		int	nsdpblocks,
		int *	sdpblocksizes,
		int *	sdpnblockvars,
		int	sdpconstnnonz,
		int *	sdpconstnblocknonz,
		int **	sdpconstrow,
		int **	sdpconstcol,
		SCIP_Real **	sdpconstval,
		int	sdpnnonz,
		int **	sdpnblockvarnonz,
		int **	sdpvar,
		int ***	sdprow,
		int ***	sdpcol,
		SCIP_Real ***	sdpval,
		int **	indchanges,
		int *	nremovedinds,
		int *	blockindchanges,
		int	nremovedblocks,
		int	nlpcons,
		int	noldlpcons,
		SCIP_Real *	lplhs,
		SCIP_Real *	lprhs,
		int *	rownactivevars,
		int	lpnnonz,
		int *	lprow,
		int *	lpcol,
		SCIP_Real *	lpval,
		SCIP_Real *	start,
		SCIP_Bool *	feasorig
	)

loads and solves an SDP using a penalty formulation

The penalty formulation of the SDP is:

$\begin{eqnarray*} \min & & b^T y + \Gamma r \\ \mbox{s.t.} & & \sum_{j=1}^n A_j^i y_j - A_0^i + r \cdot \mathbb{I} \succeq 0 \quad \forall i \leq m \\ & & Dy + r \cdot \mathbb{I} \geq d \\ & & l \leq y \leq u \\ & & r \geq 0.\end{eqnarray*}$

Alternatively withobj can be set to false to set b to 0 and only check for feasibility (if the optimal objective value is bigger than 0 the problem is infeasible, otherwise it's feasible), and rbound can be set to false to remove the non-negativity condition on r. For the non-constant SDP- and the LP-part the original arrays before fixings should be given, for the constant SDP-part the arrays AFTER fixings should be given. In addition, an array needs to be given, that for every block and every row/col index within that block either has value -1, meaning that this index should be deleted, or a non-negative integer stating the number of indices before it that are to be deleated, meaning that this index will be decreased by that number. Moreover, the total number of deleted indices for each block should be given. An optional starting point for the solver may be given; if it is NULL, the solver will start from scratch.

Warning: Depending on the solver, the given lp arrays might get sorted in their original position.

Parameters

sdpisolver	SDP interface solver structure
penaltyparam	the Gamma above, needs to be >= 0
withobj	if this is false the objective is set to 0
rbound	should r be non-negative ?
nvars	number of variables
obj	objective function values of variables
lb	lower bounds of variables
ub	upper bounds of variables
nsdpblocks	number of SDP-blocks
sdpblocksizes	sizes of the SDP-blocks (may be NULL if nsdpblocks = sdpconstnnonz = sdpnnonz = 0)
sdpnblockvars	number of variables that exist in each block
sdpconstnnonz	number of nonzero elements in the constant matrices of the SDP-Blocks AFTER FIXINGS
sdpconstnblocknonz	number of nonzeros for each variable in the constant part, also the i-th entry gives the number of entries of sdpconst row/col/val [i] AFTER FIXINGS
sdpconstrow	pointers to row-indices for each block AFTER FIXINGS
sdpconstcol	pointers to column-indices for each block AFTER FIXINGS
sdpconstval	pointers to the values of the nonzeros for each block AFTER FIXINGS
sdpnnonz	number of nonzero elements in the SDP-constraint matrix
sdpnblockvarnonz	entry [i][j] gives the number of nonzeros for block i and variable j, this is exactly the number of entries of sdp row/col/val [i][j]
sdpvar	sdpvar[i][j] gives the sdp-index of the j-th variable (according to the sorting for row/col/val) in the i-th block
sdprow	pointer to the row-indices for each block and variable
sdpcol	pointer to the column-indices for each block and variable
sdpval	values of SDP-constraint matrix entries (may be NULL if sdpnnonz = 0)
indchanges	changes needed to be done to the indices, if indchanges[block][nonz]=-1, then the index can be removed, otherwise it gives the number of indices removed before this
nremovedinds	the number of rows/cols to be fixed for each block
blockindchanges	block indizes will be modified by these, see indchanges
nremovedblocks	number of empty blocks that should be removed
nlpcons	number of active (at least two nonzeros) LP-constraints
noldlpcons	number of LP-constraints including those with less than two active nonzeros
lplhs	left hand sides of active LP rows after fixings (may be NULL if nlpcons = 0)
lprhs	right hand sides of active LP rows after fixings (may be NULL if nlpcons = 0)
rownactivevars	number of active variables for each LP constraint
lpnnonz	number of nonzero elements in the LP-constraint matrix
lprow	row-index for each entry in lpval-array, might get sorted (may be NULL if lpnnonz = 0)
lpcol	column-index for each entry in lpval-array, might get sorted (may be NULL if lpnnonz = 0)
lpval	values of LP-constraint matrix entries, might get sorted (may be NULL if lpnnonz = 0)
start	NULL or a starting point for the solver, this should have length nvars
feasorig	pointer to store if the solution to the penalty-formulation is feasible for the original problem (may be NULL if penaltyparam = 0)

Definition at line 448 of file sdpisolver_dsdp.c.

References BMS_CALL, compLowerTriangPos(), DSDP_CALL, DSDP_CALLM, EPSILONCHANGE, errorMessage(), FEASTOLCHANGE, isFixed(), SCIPsdpiSolverInfinity(), SCIPsdpiSolverIsAcceptable(), SCIPsdpiSolverIsInfinity(), and sortColRow().

Referenced by SCIPsdpiSolve(), and SCIPsdpiSolverLoadAndSolve().

EXTERN SCIP_Bool SCIPsdpiSolverWasSolved ( SCIP_SDPISOLVER * sdpisolver )

returns whether a solve method was called after the last modification of the SDP

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1301 of file sdpisolver_dsdp.c.

References errorMessageAbort().

EXTERN SCIP_Bool SCIPsdpiSolverFeasibilityKnown ( SCIP_SDPISOLVER * sdpisolver )

returns true if the solver could determine whether the problem is feasible

So it returns true if the solver knows that the problem is feasible/infeasible/unbounded, it returns false if the solver doesn't know anything about the feasibility status and thus the functions IsPrimalFeasible etc. shouldn't be used.

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1315 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiFeasibilityKnown().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetSolFeasibility	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Bool *	primalfeasible,
		SCIP_Bool *	dualfeasible
	)

gets information about primal and dual feasibility of the current SDP solution

Parameters

sdpisolver	pointer to an SDP interface solver structure
primalfeasible	stores primal feasibility status
dualfeasible	stores dual feasibility status

Definition at line 1333 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED, DSDP_CALL, and errorMessageAbort().

Referenced by SCIPsdpiGetSolFeasibility().

EXTERN SCIP_Bool SCIPsdpiSolverIsPrimalUnbounded ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be primal unbounded, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1375 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsPrimalUnbounded().

EXTERN SCIP_Bool SCIPsdpiSolverIsPrimalInfeasible ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be primal infeasible, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1401 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsPrimalInfeasible().

EXTERN SCIP_Bool SCIPsdpiSolverIsPrimalFeasible ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be primal feasible, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1427 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsPrimalFeasible(), and SCIPsdpiSolverIsOptimal().

EXTERN SCIP_Bool SCIPsdpiSolverIsDualUnbounded ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be dual unbounded, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1450 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsDualUnbounded(), and SCIPsdpiSolve().

EXTERN SCIP_Bool SCIPsdpiSolverIsDualInfeasible ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be dual infeasible, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1473 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsDualInfeasible().

EXTERN SCIP_Bool SCIPsdpiSolverIsDualFeasible ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP is proven to be dual feasible, returns FALSE with a debug-message if the solver could not determine feasibility

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1497 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsDualFeasible(), and SCIPsdpiSolverIsOptimal().

EXTERN SCIP_Bool SCIPsdpiSolverIsConverged ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff the solver converged

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1520 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsConverged(), SCIPsdpiSolverIsAcceptable(), and SCIPsdpiSolverIsOptimal().

EXTERN SCIP_Bool SCIPsdpiSolverIsObjlimExc ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff the objective limit was reached

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1538 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsObjlimExc().

EXTERN SCIP_Bool SCIPsdpiSolverIsIterlimExc ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff the iteration limit was reached

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1549 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, DSDP_CALL_BOOL, and errorMessageAbort().

Referenced by SCIPsdpiIsIterlimExc().

EXTERN SCIP_Bool SCIPsdpiSolverIsTimelimExc ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff the time limit was reached

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1567 of file sdpisolver_dsdp.c.

References errorMessageAbort().

Referenced by SCIPsdpiIsTimelimExc().

EXTERN int SCIPsdpiSolverGetInternalStatus ( SCIP_SDPISOLVER * sdpisolver )

returns the internal solution status of the solver, which has the following meaning:
-1: solver wasn't started
0: converged
1: infeasible start
2: numerical problems
3: objective limit reached
4: iteration limit reached
5: time limit reached
6: user termination
7: other

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1585 of file sdpisolver_dsdp.c.

References errorMessageAbort().

Referenced by SCIPsdpiGetInternalStatus().

EXTERN SCIP_Bool SCIPsdpiSolverIsOptimal ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP was solved to optimality, meaning the solver converged and returned primal and dual feasible solutions

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1637 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, errorMessageAbort(), SCIPsdpiSolverIsConverged(), SCIPsdpiSolverIsDualFeasible(), and SCIPsdpiSolverIsPrimalFeasible().

Referenced by SCIPsdpiIsOptimal(), and SCIPsdpiSolve().

EXTERN SCIP_Bool SCIPsdpiSolverIsAcceptable ( SCIP_SDPISOLVER * sdpisolver )

returns TRUE iff SDP was solved to optimality or some other status was reached that is still acceptable inside a Branch & Bound framework

Parameters

sdpisolver pointer to SDP interface solver structure

Definition at line 1647 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED_BOOL, errorMessageAbort(), and SCIPsdpiSolverIsConverged().

Referenced by SCIPsdpiIsAcceptable(), SCIPsdpiSolve(), and SCIPsdpiSolverLoadAndSolveWithPenalty().

EXTERN SCIP_RETCODE SCIPsdpiSolverIgnoreInstability	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Bool *	success
	)

tries to reset the internal status of the SDP solver in order to ignore an instability of the last solving call

Parameters

sdpisolver	pointer to an SDP interface solver structure
success	pointer to store, whether the instability could be ignored

Definition at line 1660 of file sdpisolver_dsdp.c.

References errorMessageAbort().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetObjval	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real *	objval
	)

gets objective value of solution

Parameters

sdpisolver	pointer to an SDP interface solver structure
objval	pointer to store the objective value

Definition at line 1670 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED, DSDP_CALL, and errorMessageAbort().

Referenced by SCIPsdpiGetObjval(), and SCIPsdpiSolve().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetSol	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real *	objval,
		SCIP_Real *	dualsol,
		int *	dualsollength
	)

gets dual solution vector for feasible SDPs

If dualsollength isn't equal to the number of variables this will return the needed length and a debug message is thrown.

Parameters

sdpisolver	pointer to an SDP interface solver structure
objval	pointer to store the objective value, may be NULL if not needed
dualsol	pointer to store the dual solution vector, may be NULL if not needed
dualsollength	length of the dual sol vector, must be 0 if dualsol is NULL, if this is less than the number of variables in the SDP, a DebugMessage will be thrown and this is set to the needed value

Definition at line 1692 of file sdpisolver_dsdp.c.

References BMS_CALL, CHECK_IF_SOLVED, DSDP_CALL, and errorMessageAbort().

Referenced by SCIPsdpiGetSol().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetPrimalBoundVars	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real *	lbvars,
		SCIP_Real *	ubvars,
		int *	arraylength
	)

gets the primal variables corresponding to the lower and upper variable-bounds in the dual problem

The last input should specify the length of the arrays. If this is less than the number of variables, the needed length will be returned and a debug message thrown.

Note: if a variable is either fixed or unbounded in the dual problem, a zero will be returned for the non-existent primal variable.

Parameters

sdpisolver	pointer to an SDP interface solver structure
lbvars	pointer to store the values of the variables corresponding to lower bounds in the dual problems
ubvars	pointer to store the values of the variables corresponding to upper bounds in the dual problems
arraylength	input: length of lbvars and ubvars output: number of elements inserted into lbvars/ubvars (or needed length if it wasn't sufficient)

Definition at line 1759 of file sdpisolver_dsdp.c.

References BMS_CALL, CHECK_IF_SOLVED, DSDP_CALL, and errorMessageAbort().

Referenced by SCIPsdpiGetPrimalBoundVars().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetIterations	(	SCIP_SDPISOLVER *	sdpisolver,
		int *	iterations
	)

gets the number of SDP iterations of the last solve call

Parameters

sdpisolver	pointer to an SDP interface solver structure
iterations	pointer to store the number of iterations of the last solve call

Definition at line 1818 of file sdpisolver_dsdp.c.

References CHECK_IF_SOLVED, DSDP_CALL, and errorMessageAbort().

Referenced by SCIPsdpiGetIterations(), and SCIPsdpiSolve().

EXTERN SCIP_Real SCIPsdpiSolverInfinity ( SCIP_SDPISOLVER * sdpisolver )

returns value treated as infinity in the SDP solver

Parameters

sdpisolver pointer to an SDP interface solver structure

Definition at line 1844 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiInfinity(), SCIPsdpiSolverCreate(), SCIPsdpiSolverIsInfinity(), and SCIPsdpiSolverLoadAndSolveWithPenalty().

EXTERN SCIP_Bool SCIPsdpiSolverIsInfinity	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real	val
	)

checks if given value is treated as (plus or minus) infinity in the SDP solver

Parameters

sdpisolver	pointer to an SDP interface solver structure
val	value to be checked for infinity

Definition at line 1852 of file sdpisolver_dsdp.c.

References SCIPsdpiSolverInfinity().

Referenced by SCIPsdpiSolverLoadAndSolveWithPenalty().

EXTERN SCIP_Real SCIPsdpiSolverMaxPenParam ( SCIP_SDPISOLVER * sdpisolver )

returns highest penalty parameter to be used

Parameters

sdpisolver pointer to an SDP interface solver structure

Definition at line 1861 of file sdpisolver_dsdp.c.

Referenced by SCIPsdpiMaxPenParam(), and SCIPsdpiSolverIsGEMaxPenParam().

EXTERN SCIP_Bool SCIPsdpiSolverIsGEMaxPenParam	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_Real	val
	)

checks if given value is greater or equal to the highest penalty parameter to be used

Parameters

sdpisolver	pointer to an SDP interface solver structure
val	value to be compared to maximum penalty parameter

Definition at line 1869 of file sdpisolver_dsdp.c.

References SCIPsdpiSolverMaxPenParam().

Referenced by SCIPsdpiSolve().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetRealpar	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_SDPPARAM	type,
		SCIP_Real *	dval
	)

gets floating point parameter of SDP-Solver

Parameters

sdpisolver	pointer to an SDP interface solver structure
type	parameter number
dval	buffer to store the parameter value

Definition at line 1878 of file sdpisolver_dsdp.c.

References SCIP_SDPPAR_EPSILON, SCIP_SDPPAR_FEASTOL, and SCIP_SDPPAR_OBJLIMIT.

Referenced by SCIPsdpiGetRealpar(), and SCIPsdpiSetRealpar().

EXTERN SCIP_RETCODE SCIPsdpiSolverSetRealpar	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_SDPPARAM	type,
		SCIP_Real	dval
	)

sets floating point parameter of SDP-Solver

Parameters

sdpisolver	pointer to an SDP interface solver structure
type	parameter number
dval	parameter value

Definition at line 1906 of file sdpisolver_dsdp.c.

References SCIP_SDPPAR_EPSILON, SCIP_SDPPAR_FEASTOL, and SCIP_SDPPAR_OBJLIMIT.

Referenced by SCIPsdpiSetRealpar().

EXTERN SCIP_RETCODE SCIPsdpiSolverGetIntpar	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_SDPPARAM	type,
		int *	ival
	)

gets integer parameter of SDP-Solver

Parameters

sdpisolver	pointer to an SDP interface solver structure
type	parameter number
ival	parameter value

Definition at line 1938 of file sdpisolver_dsdp.c.

References SCIP_SDPPAR_SDPINFO.

Referenced by SCIPsdpiGetIntpar(), and SCIPsdpiSetIntpar().

EXTERN SCIP_RETCODE SCIPsdpiSolverSetIntpar	(	SCIP_SDPISOLVER *	sdpisolver,
		SCIP_SDPPARAM	type,
		int	ival
	)

sets integer parameter of SDP-Solver

Parameters

sdpisolver	pointer to an SDP interface solver structure
type	parameter number
ival	parameter value

Definition at line 1960 of file sdpisolver_dsdp.c.

References SCIP_SDPPAR_SDPINFO.

Referenced by SCIPsdpiSetIntpar().

EXTERN SCIP_RETCODE SCIPsdpiSolverReadSDP	(	SCIP_SDPISOLVER *	sdpisolver,
		const char *	fname
	)

reads SDP from a file

Parameters

sdpisolver	pointer to an SDP interface solver structure
fname	file name

Definition at line 1994 of file sdpisolver_dsdp.c.

References errorMessageAbort().

EXTERN SCIP_RETCODE SCIPsdpiSolverWriteSDP	(	SCIP_SDPISOLVER *	sdpisolver,
		const char *	fname
	)

writes SDP to a file

Parameters

sdpisolver	pointer to an SDP interface solver structure
fname	file name

Definition at line 2004 of file sdpisolver_dsdp.c.

References errorMessageAbort().

Typedefs

Functions

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Typedef Documentation

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