MatH2OpusLowRankUpdate#

Perform a low-rank update of the form \( A = A + s * U * V^T \)

Synopsis#

PetscErrorCode MatH2OpusLowRankUpdate(Mat A, Mat U, Mat V, PetscScalar s)

Input Parameters#

  • A - the hierarchical MATH2OPUS matrix

  • s - the scaling factor

  • U - the dense low-rank update matrix

  • V - (optional) the dense low-rank update matrix (if NULL, then V = U is assumed)

Note#

The U and V matrices must be in MATDENSE dense format

See Also#

Matrices, Mat, MatCreate(), MATH2OPUS, MatCreateH2OpusFromMat(), MatCreateH2OpusFromKernel(), MatH2OpusCompress(), MatH2OpusOrthogonalize(), MATDENSE

Level#

intermediate

Location#

src/mat/impls/h2opus/cuda/math2opus.cu

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