> On Oct 27, 2016, at 10:47, William Stein <wst...@gmail.com> wrote:
>
> Just curious: what choice does magma (or maple or Mathematica etc) make
> regarding this?
Magma acts as follows, when the matrices are square, but different sizes, or
when one or both are non-square:
> M1:=Matrix(ZZ,2,2,[1,2,3,4]);
> M2:=Matrix(ZZ,3,3,[1,2,3,4,5,6,7,8,9]);
> IsSimilar(M1,M2);
>> IsSimilar(M1,M2);
^
Runtime error in 'IsSimilar': Arguments are not compatible
Argument types given: AlgMatElt[RngInt], AlgMatElt[RngInt]
That’s “sort of friendly”…
FWIW, I’d like it to blow up when deep in a computation (something is seriously
borked at that point); at the prompt, ???
HTH
Justin
--
Justin C. Walker, Curmudgeon at Large
Institute for the Absorption of Federal Funds
-----------
My wife 'n kids 'n dogs are gone,
I can't get Jesus on the phone,
But Ol' Milwaukee's Best is my best friend.
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