conjugation and Hermitian transpose should preserve matrix subdivisions

[mwageringel]

Transposing a matrix preserves its block structure:

sage: A = matrix(RDF, 2, 3); A.subdivide([1], [1]); A
⎛0.0│0.0 0.0⎞
⎜───┼───────⎟
⎝0.0│0.0 0.0⎠
sage: A.T
⎛0.0│0.0⎞
⎜───┼───⎟
⎜0.0│0.0⎟
⎝0.0│0.0⎠

The same should be the case for the conjugation and Hermitian transpose:

sage: A.H
⎛0.0 0.0⎞
⎜0.0 0.0⎟
⎝0.0 0.0⎠
sage: A.C
⎛0.0 0.0 0.0⎞
⎝0.0 0.0 0.0⎠

Component: linear algebra

Keywords: block_matrix

Issue created by migration from https://trac.sagemath.org/ticket/30468

[mkoeppe]

comment:1

Setting new milestone based on a cursory review of ticket status, priority, and last modification date.