User user50229 - Mathematics Stack Exchange

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7

votes

2

answers

385

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Calculating the total number of surjective functions

combinatorics functions

dec 25 at 2:15 hardmath 7,074

7

votes

3

answers

158

views

Analogy between “One and only one” and “If and only if”

logic terminology

nov 30 at 17:32 lhf 35.5k

1

6

votes

3

answers

212

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Diophantine equation $x^2 + 32x = y^3$

number-theory diophantine-equations elliptic-curves

apr 1 at 18:48 Paolo Leonetti 161

1

5

votes

2

answers

142

views

Are algebraic numbers analogous to group elements with finite order?

abstract-algebra group-theory soft-question algebraic-number-theory

may 5 at 15:36 user50229 490

1

5

votes

3

answers

39

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Adding edges to a forest from another forest in the same graph

graph-theory

mar 10 at 13:57 joriki 92.7k

2

4

votes

2

answers

148

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Group actions, permutation representations and currying

abstract-algebra

nov 22 at 17:27 ineff 2,293

3

votes

3

answers

130

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Algebra terminology: stable

abstract-algebra terminology

feb 10 at 20:55 Fly by Night 6,014

3

votes

2

answers

60

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Terminology: Linear 'programming'

terminology linear-programming

jan 23 at 21:27 Learner 3,339

1

3

votes

1

answer

66

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Chief series of a group

homework group-theory finite-groups

jan 20 at 20:34 Ted 7,539

1

3

votes

2

answers

100

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Original papers on the subject of group actions

abstract-algebra group-theory reference-request notation group-actions

dec 17 at 17:19 user50229 490

2

votes

2

answers

55

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Intersection of conjugate subgroups is normal

abstract-algebra group-theory

may 3 at 13:10 julien 23k

2

votes

2

answers

89

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Associativity with one operation or two (or more) operations

abstract-algebra terminology definition

apr 13 at 23:30 user50229 490

2

votes

2

answers

101

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Roots of unity in $\mathbb{Q}(\zeta_p)$ for $p$ an odd prime

abstract-algebra number-theory field-theory algebraic-number-theory

apr 9 at 12:15 user50229 490

2

votes

1

answer

106

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If $x^p +y^p = z^p$ and $xyz \neq 0$, then $p$ divides $x$ or $y$ or $z$?

abstract-algebra number-theory algebraic-number-theory diophantine-equations

apr 9 at 9:54 QiL'8 15.3k

2

votes

1

answer

72

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Law of composition

abstract-algebra terminology

jan 25 at 15:56 Andreas Blass 7,138

2

votes

2

answers

85

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Exponent of a direct product of cyclic groups

homework abstract-algebra group-theory finite-groups

jan 20 at 21:00 amWhy 54.9k

1

vote

1

answer

38

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$P \cap N$ is a Sylow $p$-subgroup of $N$, where $N$ is normal in $G$ and $P$ is a Sylow $p$-subgroup of $G$?

abstract-algebra group-theory finite-groups sylow-theory

may 11 at 17:49 Alexander Gruber♦ 15.2k

1

vote

3

answers

66

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Way to show $x^n + y^n = z^n$ factorises as $(x + y)(x + \zeta y) \cdots (x + \zeta^{n-1}y) = z^n$

polynomials algebraic-number-theory diophantine-equations factoring roots-of-unity

may 2 at 15:53 Warren Moore 1,956

1

vote

1

answer

34

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Definition of correspondence

functions terminology definition relations

apr 28 at 15:24 user50229 490

1

vote

2

answers

108

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Why are expressions such as $\operatorname{ln}(T)$ used in thermodynamics where $T$ is not dimensionless?

logarithms physics

dec 31 at 16:06 Andreas Blass 7,138

1

vote

1

answer

41

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Definition of tautological action

group-theory terminology semigroups group-actions

dec 7 at 23:03 Qiaochu Yuan 118k

0

votes

1

answer

57

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Group generated by a set of normal subgroups is normal

abstract-algebra group-theory

apr 24 at 15:59 user50229 490

0

votes

2

answers

141

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Automorphism groups and symmetric groups

abstract-algebra group-theory terminology

nov 23 at 16:42 Hagen von Eitzen 42.7k

user50229

23 Questions