BVSetSizesFromVec#

Sets the local and global sizes, and the number of columns. Local and global sizes are specified indirectly by passing a template vector.

Synopsis#

#include "slepcbv.h" 
PetscErrorCode BVSetSizesFromVec(BV bv,Vec t,PetscInt m)

Collective

Input Parameters#

  • bv - the basis vectors

  • t - the template vector

  • m - the number of columns

Notes#

Apart from the local and global sizes, the template vector t is also used to get the vector type, which will be set as the BV vector type with BVSetVecType(). This is relevant in cases where computation must be done on the GPU.

If t is a nested vector (type VECNEST), then the vector type will be obtained from the first subvector. The rationale is that BV will operate internally with regular vectors, even though the user problem is defined via nested matrices and vectors.

See Also#

BV: Basis Vectors, BVSetSizes(), BVGetSizes(), BVResize(), BVSetVecType()

Level#

beginner

Location#

src/sys/classes/bv/interface/bvbasic.c

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