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Jul
23
revised general local to global principle
added question
Jul
23
revised general local to global principle
added stuff
Jul
23
comment general local to global principle
@HenningMakholm, in the case of the Birch Swinnerton-Dyer Conjecture, that would be the rank of the elliptic curve. But I left the word "structure" as a soft terminology. That's why I made this a soft question.
Jul
23
revised general local to global principle
correction
Jul
23
comment general local to global principle
@mvw, good catch. I made a correction.
Jul
23
comment general local to global principle
My question was inspired by the Birch Swinnerton-Dyer conjecture.
Jul
23
asked general local to global principle
Jul
15
accepted Graph Isomorphism algorithm that doesn't always work
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
I've gotten good answers here before.
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
I added my answer as an edit and deleted my answer.
Jul
14
revised Graph Isomorphism algorithm that doesn't always work
added stuff
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
But even when the eigenvalues are not all distinct and $V$ is not a permutation matrix, isn't it possible to turn $V$ into a permutation matrix when the graphs are isomorphic?
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
The problem is when the eigenvalues are not all distinct. Then it is possible that $V$ is not a permutation matrix, even if the graphs are isomorphic.
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
@FPE, I just edited it, making my question clearer.
Jul
14
revised Graph Isomorphism algorithm that doesn't always work
made it clearer
Jul
14
comment Graph Isomorphism algorithm that doesn't always work
I am looking for an answer which explains why this approach is problematic, if it is problematic, or fixes the problem, if possible.
Jul
14
asked Graph Isomorphism algorithm that doesn't always work
Jul
2
awarded  Curious
Jun
20
awarded  Popular Question
Mar
19
comment Air friction question
I'm happy the solution was this easy.