Tobias Kildetoft

less info

network profile

4,726 reputation

1031

bio	website
	location
	age
visits	member for	2 years, 7 months
	seen	14 mins ago
stats	profile views	671

summary answers questions tags badges favorites bounties reputation activity

118 Answers

votes activity newest

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?

view more

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

view more

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

view more

62 Tags

139 group-theory × 47	26 linear-algebra × 7
129 abstract-algebra × 41	23 lie-algebras × 10
50 finite-groups × 23	18 representation-theory × 11
39 ring-theory × 6	18 algebra-precalculus
34 homework × 9	13 symmetric-groups × 4

view more

2 Accounts

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

26 Badges

recent class name

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

view more

0 Active bounties

active offered earned

This user has no active bounties

138 Votes Cast

all time			by type			month		week		day
127	up		52	question		57		34		24
11	down		86	answer		57		34		24

Technology			Life / Arts	Culture / Recreation	Science	Other
Stack Overflow Server Fault Super User Web Applications Ask Ubuntu Webmasters Game Development TeX - LaTeX	Programmers Unix & Linux Ask Different (Apple) WordPress Answers Geographic Information Systems Electrical Engineering Android Enthusiasts IT Security	Database Administrators Drupal Answers SharePoint User Experience Mathematica more (14)	Photography Science Fiction & Fantasy Seasoned Advice (cooking) Home Improvement more (13)	English Language & Usage Skeptics Mi Yodeya (Judaism) Travel Arqade (gaming) Bicycles Role-playing Games more (22)	Mathematics Cross Validated (stats) Theoretical Computer Science Physics more (7)	Stack Apps Meta Stack Overflow Area 51 Stack Overflow Careers

site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required

rev 2013.5.21.692