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Mathematics Colloquium EVENT DETAIL Date:  Tuesday, November 20, 2012 Title:  Singularities: characteristic zero versus positive characteristic Abstract:  A very basic invariant of the singularities of a polynomial at a point is its multiplicity. I will discuss two ``fancy" versions of this invariant, and connections between them. The first one lives (mostly) in characteristic zero and can be described as an integrability exponent. The second one lives in positive characteristic, and owes its existence to the Frobenius homomorphism. Speaker:  Mircea Mustata Institution:  Univ of Michigan   Back to current Colloquium List Back to UM Math seminars page .