151 reputation
6
bio website
location Nanjing, China
age
visits member for 1 year, 11 months
seen Aug 1 '13 at 4:55
I am now an associate professor in the math department of Nanjing University, China.

Jul
2
awarded  Curious
Apr
27
asked Automorphism of a Lie group which preserves a maximal torus is necessarily an inner automorphism?
Apr
26
accepted Normal subgroup of the identity component of a linear Lie group is normal in the whole group?
Apr
26
asked Normal subgroup of the identity component of a linear Lie group is normal in the whole group?
Apr
13
accepted Description of the units of the group ring Fp[Fp] ?
Apr
12
asked Description of the units of the group ring Fp[Fp] ?
Apr
8
comment Do Nielsen transformations on a presentation preserve the homotopy type of the corresponding presentation complex?
Thank you very much. This is exactly the reference I am looking for.
Apr
8
accepted Do Nielsen transformations on a presentation preserve the homotopy type of the corresponding presentation complex?
Apr
7
asked Do Nielsen transformations on a presentation preserve the homotopy type of the corresponding presentation complex?
Apr
5
comment The second homology of a group G and presentation complex of G
HI: yeshengkui: $\pi_2(K_{\mathcal{P}})$ is not an invariant of $G$. So when we change the presentation $\mathcal{P}$ of $G$, the size of the second homotopy group of $K_{\mathcal{P}}$ may be reduced.
Apr
5
revised The second homology of a group G and presentation complex of G
edited tags; edited title
Apr
5
asked The second homology of a group G and presentation complex of G
Mar
26
comment Decomposition of solvable Lie group
Thank you. But if G is linear, the answer to the question is Yes?
Oct
25
awarded  Supporter
Oct
22
comment Judging whether a finitely presented group is a 3-manifold group?
Yes, that is what I'd like to know.
Oct
22
accepted Judging whether a finitely presented group is a 3-manifold group?
Oct
22
comment Judging whether a finitely presented group is a 3-manifold group?
I know it is difficult to use them in practice. But I just want to know some such kind of conditions.
Oct
22
asked Judging whether a finitely presented group is a 3-manifold group?
Oct
16
awarded  Scholar
Oct
16
accepted Is it true that the orbit space of a free finite group action on a CW-complex is also a CW-complex?