Izhar Oppenheim's user avatar
Izhar Oppenheim's user avatar
Izhar Oppenheim's user avatar
Izhar Oppenheim
  • Member for 14 years, 2 months
  • Last seen this week
18 votes
3 answers
2k views

Using Stokes' theorem to define "area" enclosed by a curve

11 votes
1 answer
501 views

"minimal" embedding of bipartite graphs on a sphere

10 votes
2 answers
607 views

The "grassmannian" of a simplicial complex

9 votes
4 answers
456 views

Can one do without a classifying space when showing vanishing of cohomology

8 votes
3 answers
7k views

When is the independence number of a graph equal to its clique cover number?

5 votes
1 answer
162 views

Growth of the word norm for elementary matrices in $\rm SL_3 (\mathbb{Z})$

5 votes
0 answers
253 views

Barycenter maps that are "submultiplicative" with respect to group actions

5 votes
1 answer
375 views

Ham sandwich theorem for discrete measures - reference request

5 votes
1 answer
307 views

Connections between properties of a group and local symmetries of its Cayley graph

4 votes
1 answer
861 views

Elements of trace zero in a field extension

3 votes
0 answers
136 views

Approximating the norm of a finite dimensional representation on a Banach space by irreducible representations

1 vote
0 answers
99 views

Type-cotype inequalities for arbitrary orthonormal systems