Xiaolei Wu's user avatar
Xiaolei Wu's user avatar
Xiaolei Wu's user avatar
Xiaolei Wu
  • Member for 14 years
  • Last seen more than 2 years ago
21 votes
4 answers
4k views

Is every locally connected subset of Euclidean space R^n locally path connected ?

16 votes
2 answers
2k views

Smooth structures on the connected sum of a manifold with an Exotic sphere

16 votes
2 answers
2k views

Can anyone explain to me what is an assembly map?

15 votes
1 answer
4k views

Is it true that all real projective space $RP^n$ can not be smoothly embedded in $R^{n+1}$ for n >1

13 votes
2 answers
952 views

Kernel of linear representation of Baumslag-Solitar group

10 votes
1 answer
963 views

CAT(0) groups that does not act on CAT(0) cubical complex

9 votes
0 answers
466 views

When does a CAT(0) group contain a rank one isometry

9 votes
4 answers
2k views

How to prove the connected sum of two closed aspherical n-manfolds (n >2) is not asperical?

8 votes
2 answers
636 views

whitehead group of product of groups

5 votes
0 answers
279 views

Any method to detect subgroup generated by a subset of the generators from its presentation

4 votes
2 answers
465 views

Does a homeomorphism of $S^1 \times S^2$ which is homotopy to the identity has to isotope to it?

4 votes
2 answers
2k views

Prime ideals in the ring of algebraic integers

3 votes
0 answers
103 views

Geometric automorphism of free group respect to nonorientable suface

0 votes
1 answer
402 views

Can the order of a rational number in Z/pZ be as large as we want