I'm a student in the School of Mathematical Sciences of Peking University, China.
I'm interested in classical music and, of course, math problems~
15 A finite-dimensional vector space cannot be covered by finitely many proper subspaces? May 16 '12
5 What is good about simple Lie algebras? May 7 '12
5 Any concrete example of ''right identity and left inverse do not imply a group''? [duplicate] Sep 11 '12
5 In a ring $aba=0$ implies $ab=0$ or $ba=0$? Sep 22 '12
4 How to interpret the power of $\pi$ in the expression of the volume of an n-dimensional ball? Jan 6 '13
4 integration of fractions Apr 22 '12