300

Answers

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5

What is an interpretation of the relation in the cohomology of the pure braid groups?

1

Circle bundles over $CP^1$ and self-intersection number of $CP^1$ embeddings

4

Questions about knot (link) of surface in four dimension

4

How to visulize surface link in four dimension?

3

What kinds of manifolds admit concave boundary?

6

injectivity radius of hyperbolic surface

1

Understanding four manifolds (more details inside)

6

Probing a manifold with closed curves

2

Symmetry group for the frame bundle of a G-space

7

Is every topological (resp. Lie-) group the isometrygroup of a metric space (resp. Riemannian manifold)?

3

Differences between various categories of surface embeddings in 4-space

1

Characterizing Hessians among symmetric bilinear tensors

10

The role of ANR in modern topology

2

Vassilliev invariants of knots and their cables

1

Repertory of the different sorts of operads

18

What manifolds are boundaries of euclidian spaces ?

0

How to specify a finite group up to inner automorphism?

13

Interpretation of Riemann tensor antisymmetry

6

Seifert surfaces via Alexander duality

0

Smooth maps transverse to a foliation

5

Examples of sphere bundles

3

twisted bundle definition

4

A “dual” universal coefficient theorem

4

How Many 4-Manifolds are Symplectic?

3

(Non)-exoticness of a diffeomorphism of a sphere

4

Fundamental groups and homology groups of closed subsets of the plane

4

Minimal number of cells of a CW complex (up to homotopy)

8

Determining homotopy classes [T^2, RP^2]

4

Judging whether a finitely presented group is a 3-manifold group?

5

Interpolating a “manifold” between two points