ShinyaSakai

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1,760 reputation

420

bio	website
	location	CHINA(中国)
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visits	member for	2 years, 5 months
	seen	Apr 19 at 2:24
stats	profile views	349

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114 Questions

votes activity newest

15	Why isn't $\mathbb{C}[x,y,z]/(xz-y)$ a flat $\mathbb{C}[x,y]$-module
12	$[(x-a_1)(x-a_2) \cdots (x-a_n)]^2 +1$ is irreducible over $\mathbb Q$
12	How to get a group from a semigroup
10	What is a $p$-adic group
8	$PSL(3,4)$ has no element of order $15$

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1,760 Reputation

+5	Why can disjoint subsets be picked out in these sets?
+5	The automorphism group of a direct product of abelian groups is isomorphic to a matrix group
+5	For any irreducible variety $X$ and any point $x$ in $X$, dim$\mathscr{T}(X)_x \geq$ dim$X$, with equality holds in a dense open subset of $X$
+5	universal abelian covering space

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6 Answers

votes activity newest

2	If a subgroup of an algebraic group is solvable, is its closure necessarily solvable?
2	Group, subgroup, homomorphism and core
2	If $H \leq G$, $N \lhd G$, $G=HN'$, then $G = H( \gamma _i N)$ for all $i$
1	Is it true that under the Zariski topology, a subset is dense if and only if it is a nonempty open subset
0	Any quotient group of $(\mathbb Q,+)$ is torsion

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54 Tags

4 group-theory × 26	0 algebraic-geometry × 20
4 homework × 21	0 abstract-algebra × 12
3 algebraic-groups × 37	0 lie-algebras × 11
1 general-topology × 6	0 commutative-algebra × 5
1 topological-groups × 3	0 finite-groups × 4

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4 Accounts

$Mathematics Stack Exchange$	Mathematics	1,760 rep	420
	Japanese Language & Usage	131 rep	3
	English Language & Usage	121 rep	4
	Chinese Language & Usage	111 rep	3

20 Badges

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Taxonomist	Enthusiast
Nice Question × 4	Talkative
Yearling × 2	Vox Populi
Revival	Suffrage
Popular Question	Autobiographer

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217 Votes Cast

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