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

4 votes
Accepted

For which finite projective planes can the incidence structure be written as a circulant mat...

To answer your questions: 1) A projective plane admits a circulant incidence matrix if and only if the automorphism group contains a cyclic group acting regularly on points and regularly on blocks. E …
Padraig Ó Catháin's user avatar
5 votes
Accepted

What is the mathematician's definition of the determinant?

Not an answer, but too long for a comment. The most useful definition of the determinant will depend on the audience you are speaking to. The cleanest definition is probably in terms of the top part o …
Padraig Ó Catháin's user avatar