24 Feb
2016
24 Feb
'16
1:28 p.m.
Would lower triangular square matrices (i.e., including the diagonal) with positive entries work? —Dan
On Feb 24, 2016, at 11:50 AM, Veit Elser <ve10@cornell.edu> wrote:
On Feb 24, 2016, at 2:13 PM, Dan Asimov <dasimov@earthlink.net <mailto:dasimov@earthlink.net>> wrote:
[If]
M = A x B
, then for any kxk matrix G having an inverse H we also have
M = (AxG) x (HxB)
. . . Fun puzzle: what group of matrices (for insertion) preserves non-negativity?