Moishe Kohan's user avatar
Moishe Kohan's user avatar
Moishe Kohan's user avatar
Moishe Kohan
  • Member for 10 years, 6 months
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45 votes
1 answer
2k views

Exotic $R^4$ as the universal covering space

16 votes
0 answers
7k views

Story of "Grothendieck's prime number" 57

16 votes
2 answers
1k views

Groups containing each other as finite index subgroups

15 votes
1 answer
487 views

fundamental groups of complements to countable subsets of the plane

15 votes
1 answer
2k views

Can one cover the plane with less than continuum of lines?

15 votes
3 answers
460 views

Local complexity of triangulations

13 votes
0 answers
321 views

Nonsmoothable 4-manifolds

12 votes
2 answers
711 views

Representing graphs as unions of trees

12 votes
0 answers
230 views

Does cohomology ring determine a compact symmetric space?

11 votes
1 answer
291 views

Free product decompositions of the fundamental group of Hawaiian Earrings

10 votes
1 answer
414 views

Topological spaces admitting CAT(1) metrics

10 votes
0 answers
292 views

Closed geodesics on closed manifolds

8 votes
0 answers
183 views

Are triangulations of n-dimensional manifolds determined by lower-dimensional skeleta?

7 votes
0 answers
198 views

Existence of codimension 1 topological foliations

7 votes
2 answers
1k views

Surjective entire functions without critical points

7 votes
0 answers
534 views

Zariski-homeomorphisms

6 votes
0 answers
128 views

Path metrics without geodesics [duplicate]

5 votes
2 answers
247 views

Group actions on affine varieties with closed orbits

5 votes
0 answers
72 views

Covering hyperbolic manifolds by round balls

5 votes
1 answer
157 views

Topology of the space of univalent functions

3 votes
0 answers
457 views

Uniformization of algebraic curves