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Timeline for Commutative subalgebras of M_n

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Jun 22, 2010 at 16:13 comment added Robin Chapman I should add that Tom's observation essentially reduces the isomorphism classification of commutative subalgebras of $M_n(\mathbb{C})$ to that of nilpotent commutative subalgebras.
Jun 22, 2010 at 16:05 history answered Robin Chapman CC BY-SA 2.5