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piper1967
  • Member for 2 years, 7 months
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9 votes
1 answer
500 views

Submersion vs fiber bundle

8 votes
2 answers
773 views

Group of exponential growth always contains a free sub-group?

7 votes
2 answers
311 views

Boundary of a $4$-manifold and the fundamental group

6 votes
0 answers
227 views

Different rational homotopy type with generators of different degree but cohomology algebras same

6 votes
1 answer
222 views

Positive harmonic functions on nilpotent groups & Random walk on groups with a finite number of generators

6 votes
3 answers
828 views

Finite CW complex with finite non-abelian fundamental group and higher homologies zero

5 votes
1 answer
405 views

A question related to fiber bundle

4 votes
0 answers
141 views

$\mathbb{Z}$-homology plane and compact support cohomology

4 votes
0 answers
668 views

Submersion and fiber bundle

4 votes
1 answer
315 views

Building a manifold from a CW complex inductively

3 votes
1 answer
307 views

How to get a Stein space which has homotopy type of suspension of another Stein space

3 votes
0 answers
71 views

Vietoris-Begle type result for differentiable fiber bundle

2 votes
1 answer
338 views

$4$-manifold with simply connected boundary

2 votes
0 answers
192 views

$4$-manifolds with boundary homotopic to $K(G,1)$

2 votes
1 answer
156 views

Homological restrictions on certain $4$-manifolds

2 votes
0 answers
80 views

Existence of a proper Morse function

2 votes
0 answers
52 views

Projective resolution of a dual coefficient system

2 votes
0 answers
58 views

Dimension changes from global to local immersion

1 vote
0 answers
94 views

Cohomology with coefficient in sheaf of morphisms of an algebraic group

1 vote
0 answers
62 views

Proper Morse function on open set

1 vote
0 answers
74 views

Milnor fibration and Runge pair

1 vote
0 answers
79 views

Homotopy type of a general fiber for a polynomial

1 vote
0 answers
181 views

Questions related to Morse theory

1 vote
0 answers
104 views

Quotienting a virtually cyclic group by an element [closed]

1 vote
0 answers
113 views

Inclusion inducing isomorphism at all level except one

1 vote
3 answers
644 views

How can I construct a closed manifold from a finite CW complex?

1 vote
0 answers
187 views

How to check a fiber bundle is trivial

1 vote
0 answers
126 views

Middle Betti number bound of special $4$-manifolds

1 vote
0 answers
45 views

A question related to injective envelope for a system of DGA's

0 votes
0 answers
128 views

Stein manifold homotopic to wedge of two Stein manifolds