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Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
1
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Simultaneous similarity of pair of matrices
So let me try to give a definite answer. We have a non-zero system of linear homogeneous equations $\Sigma$ in $n^2$ variables $x_{ij}$ having an infinite set of solutions and the matrix $M=((x_{ij})) …
1
vote
Simultaneous similarity of pair of matrices
First find an invertible matrix $C$ conjugating $A$ to $A'$ (I assume you can do that in polynomial time). Consider $E=CBC^{-1}$. It remains to find an invertible $D$ which commutes with $A'$ and conj …