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15
103
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Can one set and use some axioms for calculating intersection forms of manifolds?

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#algebraic-topology #differential-topology #homology-cohomology #4-manifolds
208
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Second Stiefel-Whitney class of $\mathbb{C}\text{P}^2\#\overline{\mathbb{C}\text{P}^2}$

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#reference-request #algebraic-topology #characteristic-classes #4-manifolds
78
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Representation by Complex Surfaces

Published on
#complex-geometry #4-manifolds
74
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Conflicting definitions of instanton number

Published on
#differential-geometry #characteristic-classes #gauge-theory #4-manifolds
381
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Notes on Low-Dimensional Topology

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#general-topology #reference-request #knot-theory #low-dimensional-topology #4-manifolds
172
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Homology of orientable 4-manifold given fundamental group and Euler characteristic

Published on
#homology-cohomology #cw-complexes #4-manifolds
202
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Killing a cohomology class in a manifold by taking out a submanifold representing its Poincaré-dual

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#algebraic-topology #geometric-topology #4-manifolds
81
Views

Expressing complexified tangent bundle of a spin 4-manifold as a Hom bundle

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#differential-geometry #riemannian-geometry #tangent-bundle #spin-geometry #4-manifolds
385
Views

Relatively minimal elliptic surfaces which are not minimal

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#algebraic-geometry #complex-geometry #complex-manifolds #4-manifolds
73
Views

How to visualize these shapes $\#^k(S^2 \times S^2)$?

Published on
#geometric-topology #4-manifolds
105
Views

Kirby Diagram for the Trefoil

Published on
#knot-theory #manifolds-with-boundary #4-manifolds
41
Views

$c_1^2(L)\geq 0$ for a nef line bundle $L\to S$ over a complex surface

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#algebraic-geometry #algebraic-topology #complex-geometry #line-bundles #4-manifolds
66
Views

Circle action on a 5-dimensional manifold and Euler class

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#algebraic-topology #homology-cohomology #geometric-topology #4-manifolds #orbifolds
155
Views

Some questions about Twistor Space of a closed $4$-manifold

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#differential-geometry #riemannian-geometry #connections #4-manifolds #twistor-theory
202
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Intersection form of a 4-manifold with boundary

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#algebraic-topology #geometric-topology #intersection-theory #low-dimensional-topology #4-manifolds

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