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Algorithms for automorphism groups
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Degenerate tensors. #2

Open algeboy opened 7 years ago

algeboy commented 7 years ago

Need to include the functionality of pseudo-isometries of degenerate tensors.

It is in theory trivial, because

Prop. If : V x V >--> W, V = rad V + V0, and # := restriction of to V0; then, PIsom( * ) = hom ( V, rad V) \rtimes PIsom( # ).

So this is a recursive call followed by gluing in hom(V,rad V). But the decomposition V=rad V + V0 will us a different basis so there is a conjugation issue. This is almost implemented but commented out because of the basis issue.

Also need FullyNondegenerate.