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seen Dec 20 '13 at 13:54

Jul
2
awarded  Curious
Jun
14
awarded  Popular Question
Jun
20
awarded  Yearling
Apr
21
comment Algebraic group homomorphism
well,I need to think about it.
Apr
21
comment Algebraic group homomorphism
Yes,agree.So it should be that there exist $P \in GL_{n}(\mathbb C)$ such that $P\phi(G_{m})P^{-1}$ lies in the diagonal matrices.Certainly there exist $P$ such that $P\phi(G_{m})P^{-1}$ lies in set of all upper triangular matrices.
Apr
21
suggested suggested edit on Can $C_{10}$ be isomorphic to $C_5\times C_2$?
Apr
21
asked Algebraic group homomorphism
Feb
6
comment Irreducible element of the ring.
@Sarjbak: thanks for your nice solution.
Feb
4
accepted dimension of image of proper closed set under a morphism.
Feb
4
comment dimension of image of proper closed set under a morphism.
Sorry I got your idea as restriction of a finite morphism on a closed set is finite.
Feb
4
comment dimension of image of proper closed set under a morphism.
sorry,I did not get your idea completely.I can show that if $\pi $ is finite surjective morphism from irreducible to irreducible ,then dim$X=$dim$Y$.But why should restriction of finite morphism finite?
Feb
4
comment dimension of image of proper closed set under a morphism.
I am sorry that i am not aware of base-scheme Jacobson?But I think now question is clear to you.
Feb
4
revised dimension of image of proper closed set under a morphism.
added 15 characters in body
Feb
4
asked dimension of image of proper closed set under a morphism.
Feb
3
accepted Irreducible element of the ring.
Feb
2
revised Irreducible element of the ring.
added 13 characters in body
Feb
2
comment Irreducible element of the ring.
Sorry forget to mention ,now I have corrected it.
Feb
2
revised Irreducible element of the ring.
added 21 characters in body
Feb
2
asked Irreducible element of the ring.
Jan
8
accepted Generator of the fundamental group of $ \mathbb RP^{2}$.