MathOverflow

ag.algebraic-geometry × 75 nt.number-theory × 69 reference-request × 63 fa.functional-analysis × 45 co.combinatorics × 40 rt.representation-theory × 38 lo.logic × 36 pr.probability × 33 set-theory × 31 ct.category-theory × 29 dg.differential-geometry × 25 gr.group-theory × 25 real-analysis × 25 at.algebraic-topology × 24 ac.commutative-algebra × 20 gt.geometric-topology × 20 linear-algebra × 18 al

[zhaowuy]

usual quantum groups, examples of secondary Steenrod algebra of Bauese etc. into a unique natural higher Hopf setting

[KatagiriSo]

数学

[nsyee]

数学板stackoverflowあったの知らなんだ。

[sayamatcher]

こんなのがあるのか〜。へー #SPARCjp201303

[theatrical]

stack overflowの数学板？

[wantan200]

数学者のための質問掲示板

[kazwat]

数学よろず質問サイト。MathJax使用。英語。レベル高。

[IanLewis]

A place for mathematicians to ask and answer questions.

[coleus]

数学者のための質問掲示板。

[pho]

"A place for mathematicians to ask and answer questions."なかなかよさげ