User yoyostein - Mathematics Stack Exchange

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	236 reputation	bio	website		visits	member for	1 year, 1 month
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12

45

votes

12

answers

3

kviews

Is it morally right and pedagogically right to google answers to homework? [closed]

homework soft-question

sep 4 at 14:15 Ismael 1

21

43

votes

7

answers

2

kviews

Math and mental fatigue

soft-question

mar 31 at 15:20 Joachim 1,176

4

7

votes

2

answers

551

views

What exactly is a tensor product?

abstract-algebra tensor-products quantum-groups

may 13 '12 at 17:40 Michael Hardy 48.2k

6

votes

3

answers

674

views

Continuous function from $(0,1)$ onto $[0,1]$

real-analysis

apr 20 at 12:34 Thomas Andrews 29.9k

6

votes

1

answer

118

views

Quantum Groups: prove $U_1'\cong U[K]/(K^2-1)$ and $U\cong U_1'/(K-1)$

quantum-groups hopf-algebras

mar 24 at 15:03 Norbert 20.4k

3

6

votes

0

answers

145

views

Basis of $SL_q(2)$

abstract-algebra quantum-groups hopf-algebras

jan 19 at 17:59 YACP 9,165

5

votes

3

answers

318

views

Gödel's Paradox — Every set of formulas is consistent

logic fake-proofs

apr 26 at 22:19 logic_runs_this_town 19

1

4

votes

1

answer

106

views

Galois group permutation of roots

galois-theory

jan 22 at 4:38 JSchlather 9,735

2

4

votes

3

answers

132

views

diffusion equation, inhomogenous boundary conditions (the subtraction method)

pde

dec 18 at 21:21 JohnD 3,490

4

votes

1

answer

152

views

$x \phi (x) = y\phi (y)$ implies $x=y$? (Euler totient) [duplicate]

homework number-theory elementary-number-theory

nov 7 at 18:27 EuYu 15.1k

4

votes

0

answers

144

views

(Mathematical) Applications of Quantum Group

abstract-algebra soft-question

mar 31 '12 at 15:53 yoyostein 236

4

votes

1

answer

120

views

Submodules of Free modules counter-example: $Z/4Z$

abstract-algebra commutative-algebra

mar 31 '12 at 8:55 yoyostein 236

3

votes

2

answers

80

views

(Logic) Formally writing a rational number in logic

logic

apr 27 at 17:39 André Nicolas 161k

3

votes

0

answers

66

views

Difference between elementary submodel and elementary substructure

logic terminology model-theory

apr 24 at 14:24 Asaf Karagila 91.2k

3

votes

1

answer

62

views

Prove that two structures are elementarily equivalent (Logic)

logic model-theory

apr 21 at 13:37 tomasz 7,110

1

3

votes

2

answers

62

views

disjoint union Topology question

general-topology

feb 6 at 16:41 Asaf Karagila 91.2k

1

3

votes

1

answer

88

views

Hopf algebra: Identity under convolution

hopf-algebras

jan 11 at 9:13 Julian Kuelshammer 3,635

3

votes

4

answers

162

views

How to prove $t^{23}+1$ irreducible in $F_p$?

polynomials galois-theory

aug 29 at 23:59 i. m. soloveichik 2,359

3

votes

0

answers

53

views

Why is the Quasitriangular Hopf algebra called “Quasitriangular”?

hopf-algebras

aug 15 at 11:52 yoyostein 236

3

votes

2

answers

96

views

Radius of Convergence of power series, with n! and $n^n$

calculus

jul 4 at 15:57 Mercy 4,470

1

3

votes

5

answers

134

views

Definite Integral (Calculus)

calculus

jun 16 '12 at 19:18 passenger 818

3

votes

1

answer

138

views

What exactly is a R-matrix?

quantum-groups

may 11 '12 at 21:04 rotten 306

2

votes

1

answer

41

views

Converse of Hopf Algebra Theorem

quantum-groups hopf-algebras

mar 5 at 3:05 redfiloux 346

2

votes

1

answer

41

views

Tensor Product Question in Kassel's Quantum Groups

tensor-products quantum-groups hopf-algebras

jan 9 at 10:22 Julian Kuelshammer 3,635

2

votes

1

answer

84

views

Prove well-definedness of comultiplication and counit of $GL_q(2)$ and $SL_q(2)$.

quantum-groups hopf-algebras

dec 17 at 22:06 mebassett 326

2

votes

1

answer

130

views

Question on Euler Totient, and finding a function

number-theory

nov 19 at 22:32 Marko Riedel 1,899

1

2

votes

1

answer

126

views

Does the theorem work for even primes (i.e. p=2)

homework elementary-number-theory

aug 31 at 15:44 Karolis Juodelė 4,163

1

2

votes

2

answers

111

views

Use a particular method to prove if $a^n \mid b^n$ then $a\mid b$

elementary-number-theory

aug 29 at 16:24 Community♦ 1

2

votes

2

answers

138

views

Elementary Number Theory (GCD)

elementary-number-theory

aug 5 at 8:46 lab bhattacharjee 28.9k

2

votes

1

answer

150

views

Slope of curve in $\mathbb{R}^3$

calculus

jun 25 '12 at 10:47 hwhm 324

yoyostein

63 Questions