منابع مشابه
Riemann surfaces: noncommutative story
For an open and dense subset in the Teichmüller space, we introduce a coordinate system which is (relatively) well-behaved under the action of the mapping class group. Surprisingly, the coordinates involve the set of projections and traces in a C∗-algebra. We argue that our approach might be helpful for representation of the mapping class group, and other issues.
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Let A = L i≥0 Ai be a connected graded, noetherian k-algebra that is generated in degree one over an algebraically closed field k. Suppose that the graded quotient ring Q(A) has the form Q(A) = k(X)[t, t, σ], where σ is an automorphism of the integral projective surface X. Then we prove that A can be written as a näıve blowup algebra of a projective surface X birational to X. This enables one t...
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ژورنال
عنوان ژورنال: Advances in Mathematics
سال: 2004
ISSN: 0001-8708
DOI: 10.1016/s0001-8708(03)00147-6