remncomm.m

Removes from the Hermitian operator A the part that does not commute with the Hermitian operator B.

Syntax

    C=remncomm(A,EvB)

Parameters

   A     -  a square matrix

   EvB   -  a square matrix containing eigenvectors 
            of B in columns

Outputs

   C     -  a square matrix

Notes

When the matrix B is diagonal, the part of A that commutes with it is the diagonal part, so just use diag(diag(A)).

See also

acomm.m, arnoldi.m, atranspose.m, aux_mat.m, binpack.m, cheap_norm.m, cheb_coeff.m, clean_up.m, dirdiff.m, eigenfields.m, expdrop.m, expmint.m, expmint2.m, fftdiff.m, fourdif.m, fourlap.m, frob_chop.m, gaussfun.m, hdot.m, herm_spline.m, jacobianest.m, keep_rank.m, krondelta.m, kronm_new.m, logfactorial.m, lorentzcon.m, lorentzfun.m, md5_hash.m, mprealloc.m, remtrace.m, rspert.m, rspt_eig.m, snormpdf.m, svd_shrink.m, tikhoind.m, tikhonov.m, trapdiff.m, unit_oper.m, unit_state.m, vvpert.m, Kernel_utilities

Version 2.5, authors: Ilya Kuprov