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Picard–Lefschetz theory

In mathematics, Picard–Lefschetz theory studies the topology of a complex manifold by looking at the critical points of a holomorphic function on the manifold. It was introduced by Émile Picard for co ...

In algebraic geometry, a branch of mathematics, the Lefschetz theorem on (1,1)-classes, named after Solomon Lefschetz, is a classical statement relating divisors on a compact Kähler manifold to classe ...

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Lefschetz manifold

In mathematics, a Lefschetz manifold is a particular kind of symplectic manifold, sharing a certain cohomological property with Kaehler manifolds, that of satisfying the conclusion of the Hard Lefsche ...

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Lefschetz pencil

In mathematics, a Lefschetz pencil is a construction in algebraic geometry considered by Solomon Lefschetz, used to analyse the algebraic topology of an algebraic variety V. A pencil is a particular k ...

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Paul Althaus Smith

Paul Althaus Smith (1900 – June 13, 1980) was an American mathematician. His name occurs in two significant conjectures in geometric topology: the Smith conjecture, which is now a theorem, and the Hil ...

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Solomon Lefschetz

Solomon Lefschetz (3 de septiembre de 1884 - 5 de octubre de 1972), ingeniero y matemático estadounidense de origen ruso, pionero en el desarrollo de las técnicas algebraicas de topología, palabra que ...

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