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Shiquan
  • Member for 11 years
  • Last seen more than 2 years ago
  • Greenland
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Graduate Student in Dept Math, Topology and Differential Geometry

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question
20
Every closed subset $E\subseteq \mathbb{R}^n$ is the zero point set of a smooth function
May 12, 2014
question
17
different definitions of Hopf algebras
Jul 24, 2015
question
16
How to prove a commutative, with unit, Noetherian ring $A$ only has finitely many minimal prime ideals via the following step?
Oct 14, 2013
question
15
Homotopy groups of a wedge sum
Aug 29, 2014
question
15
Commuting matrices are simultaneously triangularizable
Dec 3, 2013
question
11
cup product in cohomology ring of a suspension
May 26, 2015
question
11
If $A[[x]]$ is Noetherian, will $A$ be Noetherian?
Nov 15, 2013
question
10
for any ring $A$ the matrix ring $M_n(A)$ is simple if and only if $A$ is simple
Jan 28, 2014
question
9
measure on non-oriented Riemannian manifold
Mar 29, 2014
question
9
Counterexamples to the avoidance lemma for arbitrary ideals
Nov 7, 2013
Top network posts
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9
cohomology of classifying space of permutation groups
9
embedding of quaternionic projective spaces
8
contractible configuration spaces
8
quotient space of Eilenberg-MacLane space
7
kernel of the mod $2$ Bockstein on the first cohomology group