8

Questions
votes newest views recent
8
17
votes
13
answers
2k
views

Do you find your students are less competent in basic algebra and arithmetic, and, if so, do you believe that this is due to overuse of calculators at an early level? [closed]

mar 1 12 at 1:29 Yemon Choi 8,437●1●19●44

14
10
votes
2
answers
6k
views

Beamer printout

nov 13 at 17:20 Andrew Stacey 16k●1●40●110

1
7
votes
2
answers
236
views

Which closed orientable $4$-dimensional manifolds cannot be embedded in $6$-space?

mar 11 12 at 4:11 Igor Rivin 31.1k●3●37●71

 
7
votes
0
answers
197
views

What is the historical connection between Zeeman’s twist spinning and Fox’s Examples?

feb 5 at 14:06 quid 12.9k●31●51

3
6
votes
5
answers
571
views

Braided Monoidal 2-categories with duals

may 15 at 0:24 Hiro Lee Tanaka 1,373●7●14

 
6
votes
0
answers
240
views

Is the category of tangles that includes, X, Y, and Lambda a free Frobenius braided category?

jul 24 11 at 20:37 Scott Carter 3,448●1●9●23

 
4
votes
1
answer
214
views

Branched Coverings of the $4$-sphere branched along a knotted surface

aug 20 at 2:34 Scott Carter 3,448●1●9●23

1
2
votes
0
answers
351
views

Why are Lie Algebras/ Lie Groups so much like crossed modules, and not?

may 30 10 at 23:33 Theo Johnson-Freyd 22.2k●2●27●110