36

Answers

votes newest views recent

1

For any entourage $U,V$ there’s an entourage $W$ such that $U\circ W\subseteq V\circ U$

3

Artin groups whose graphs differ by one edge and coverings

2

Which topological spaces admit a nonstandard metric?

4

Projective modules over non-rational group rings

1

Finding lattice with short basis-vectors containing given lattice

1

Topology of maps between fibers of vector bundles

2

Examples of non-metrizable spaces

1

Convex subsets of Hadamard manifolds

2

Simple examples of equivariant homology and bordism

3

Partial orders arising from $l$-spaces

11

The free group $F_2$ has index 12 in SL(2,$\mathbb{Z}$)

2

Canonical geometric examples

1

max length or size of a convex set

8

Are there space filling curves for the Hilbert cube ?

0

Collapsing objects in a category

1

Pascal Triangle and Prime Numbers

2

Oriention-Reversing Diffeomorphisms of a Manifold

2

Notion of finite dimensional simplicial space (2)

2

Principle when limits level by level don’t commute with simplicial structure

0

When is the realization of a simplicial space compact ?

2

Spectral properties of Cayley graphs

5

Question about exotic spheres

1

how slow can the dimension of a product set grow?

0

circle action on sphere

15

Proving that a group is free

2

Lifting matrices mod 2 to integers.

1

Finding saturated open sets

3

How to solve f(f(x)) = cos(x) ?

2

Integrability of derivatives

8

homotopy associative $H$-space and $coH$-space