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Questions about the properties of vector spaces and linear transformations, including linear systems in general.

1 vote
1 answer
230 views

Does the cosine of a matrix have a geometric (non power series) interpretation? [closed]

You can adapt the power series definition of cosine to take in a matrix. Does this have a geometric interpretation/definition? Can it be used for various purposes? I actually have extended the matrix …
Insulin69's user avatar
1 vote
0 answers
216 views

Is there a name for the algebraic structure of all real matrices?

I know there are matrix rings, but what do we call the structure of the set of ALL real matrices, with the usual sum and product? We are looking for a kind of algebra whose operations aren't defined f …
Insulin69's user avatar