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Weak Lefchetz for a quasiprojective variety and a non-generic hyperplane

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#algebraic-geometry #algebraic-topology #morse-theory #higher-homotopy-groups
471
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Covering map corresponding to surjection

Published on
#algebraic-topology #covering-spaces
346
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Do contractible homology manifolds have one end?

Published on
#algebraic-topology #geometric-topology
240
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Projection to subbundle is continuous in vector bundle

Published on
#algebraic-topology #differential-topology #vector-bundles
634
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Equivalence of two definitions of simple connectedness.

Published on
#general-topology #complex-analysis #algebraic-topology
96
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Attaching maps in CW Complexes

Published on
#algebraic-topology
1.2k
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Intersection number and cup product

Published on
#algebraic-topology #intersection-theory #poincare-duality
1.8k
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Computing the first simplical homology group of the torus $H_1(T)$

Published on
#algebraic-topology #homology-cohomology
208
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Infinite cyclic cover corresponding to non-zero cohomology class $\alpha \in H^1(x,\mathbb Z)$

Published on
#geometry #differential-geometry #algebraic-topology #complex-geometry #covering-spaces
737
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“intersection number” of surface with boundary

Published on
#algebraic-topology #intersection-theory
807
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Uniqueness of lift in covering space theory

Published on
#algebraic-topology #covering-spaces
227
Views

singular cohomology and Poincaré duality

Published on
#algebraic-topology #homology-cohomology #de-rham-cohomology #poincare-duality
37
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Are the restrictions of constructible functions on the level set of smooth map still constructible functions?

Published on
#algebraic-topology
899
Views

Can a cell-complex have no zero cell?

Published on
#algebraic-topology #cw-complexes
672
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Smooth quotient bundle

Published on
#differential-geometry #algebraic-topology #smooth-manifolds #vector-bundles

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