Tobias Kildetoft

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4,726 reputation

1031

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119 Answers

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20	If $x^3 =x$ then $6x=0$ in a ring
18	Why is $\sqrt{4} = 2$ and Not $\pm 2$?
17	Why do we define quotient groups for normal subgroups only?
14	how to find all groups that have exactly 3 subgroups?
13	Difference between bijection and isomorphism?

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4,726 Reputation

+10	How to find all elements of $\mathbb{Z}_{4} \times\mathbb{Z}_{4}/\langle(1,1)\rangle$?
+10	Consider a Group $G$ of order $20$ such that $G=Aut$($Z_{25},+) \cong (U_{25}, \cdot)$. Analyze the Sylow subgroups in G.
+10	About commutators and center o a certain group
+10	Showing that if $N \le G$ is finite minimal normal and every simple homomorphic image is abelian, then N is elementary abelian

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9 Questions

votes activity newest

19	Sudokus as composition tables of finite groups
10	Has this “generalized semidirect product” been studied?
6	Group actions transitive on certain subsets
3	Given an $n$, are there infinitely many finite fields $F$ such that none of the orders of $PSL_n(F)$ divide each other?
3	Irreducible representations of a cyclic group of order p over a field of q elements when p and q are distinct primes

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62 Tags

145 group-theory × 50	26 linear-algebra × 7
136 abstract-algebra × 45	24 lie-algebras × 12
52 finite-groups × 24	18 representation-theory × 11
39 ring-theory × 6	18 algebra-precalculus
34 homework × 9	13 symmetric-groups × 4

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2 Accounts

$Mathematics Stack Exchange$	Mathematics	4,726 rep	1031
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	61 rep	2

26 Badges

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Constituent	group-theory
Outspoken	abstract-algebra
Caucus	Nice Question × 2
Enlightened × 4	Quorum
Nice Answer × 8	Revival

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