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Displaying 61 – 80 of 88

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Singularities on complete algebraic varieties

Fedor Bogomolov, Paolo Cascini, Bruno Oliveira (2006)

Open Mathematics

We prove that any finite set of n-dimensional isolated algebraic singularities can be afforded on a simply connected projective variety.

The dynamics of holomorphic maps near curves of fixed points

Filippo Bracci (2003)

Annali della Scuola Normale Superiore di Pisa - Classe di Scienze

Let M be a two-dimensional complex manifold and f : M M a holomorphic map. Let S M be a curve made of fixed points of f , i.e.  Fix ( f ) = S . We study the dynamics near  S in case  f acts as the identity on the normal bundle of the regular part of  S . Besides results of local nature, we prove that if  S is a globally and locally irreducible compact curve such that S · S < 0 then there exists a point p S and a holomorphic f -invariant curve with  p on the boundary which is attracted by  p under the action of  f . These results are achieved...

The Seiberg–Witten invariants of negative definite plumbed 3-manifolds

András Némethi (2011)

Journal of the European Mathematical Society

Assume that Γ is a connected negative definite plumbing graph, and that the associated plumbed 3-manifold M is a rational homology sphere. We provide two new combinatorial formulae for the Seiberg–Witten invariant of M . The first one is the constant term of a ‘multivariable Hilbert polynomial’, it reflects in a conceptual way the structure of the graph Γ , and emphasizes the subtle parallelism between these topological invariants and the analytic invariants of normal surface singularities. The second...

Currently displaying 61 – 80 of 88