Question

Does every involution have a fixed point?

score 970 · Answer 1 · 2026-04-12 23:22:26

970

Views

Does every involution have a fixed point?

Published on 12 Apr 2026 - 23:22

score 137 · Answer 2 · 2026-04-18 00:01:39

137

Views

Proving that the limit of the integral of the following version of the topologist's sine curve exists, but that of the absolute value doesn't

Published on 18 Apr 2026 - 0:01

score 223 · Answer 3 · 2026-04-14 03:43:34

223

Views

Examples of finite-dimensional, semisimple, non-separable $k$-algebras?

Published on 14 Apr 2026 - 3:43

score 353 · Answer 4 · 2026-04-15 12:28:09

353

Views

Construct a function $f$ such that the above limit exists, although it fails to exist with $| f |$ in place of $f$ .

Published on 15 Apr 2026 - 12:28

score 71 · Answer 5 · 2026-04-15 13:17:39

71

Views

Examples about strictly concave functions with $f(x+z)=f(x)+f'(x)z$

Published on 15 Apr 2026 - 13:17

score 85 · Answer 6 · 2026-04-11 16:06:25

85

Views

Examples of Surjective Contractions on Reals

Published on 11 Apr 2026 - 16:06

score 31 · Answer 7 · 2026-04-14 21:20:42

31

Views

Example of Non-Affine Lipschitz Contractions

Published on 14 Apr 2026 - 21:20

score 56 · Answer 8 · 2026-04-16 18:46:34

56

Views

Counterexample/Example - continuity of parametric integral

Published on 16 Apr 2026 - 18:46

score 715 · Answer 9 · 2026-04-11 22:01:19

715

Views

Conjecture about the transitive closure of a relation $\mathcal R $ over a finite set $A$

Published on 11 Apr 2026 - 22:01

score 91 · Answer 10 · 2026-04-15 03:02:02

91

Views

Reflexivity, symmetry, and transitivity of difference operation between two binary relations

Published on 15 Apr 2026 - 3:02

score 32 · Answer 11 · 2026-04-14 19:05:32

32

Views

Example of $\alpha \in R$ s.t. $\alpha$ is not prime and $\alpha$ cannot be factored into a product of primes

Published on 14 Apr 2026 - 19:05

score 430 · Answer 12 · 2026-04-11 08:44:53

430

Views

Basic questions about the sobolev space $H^\infty(\mathbb{R})$

Published on 11 Apr 2026 - 8:44

score 96 · Answer 13 · 2026-04-13 10:26:54

96

Views

Example of two unbounded sets separated by a positive value that are not finitely additive

Published on 13 Apr 2026 - 10:26

score 112 · Answer 14 · 2026-04-14 18:41:50

112

Views

Example of a minimal equivalence relation on $A$ containing $R$

Published on 14 Apr 2026 - 18:41

score 78 · Answer 15 · 2026-04-17 13:35:08

78

Views

Reflexivity, symmetry, and transitivity of $S=\{(X,Y)\in\mathscr P(A)\times \mathscr P(A)|\forall x\in X\exists y\in Y(xRy)\}$

Published on 17 Apr 2026 - 13:35

List Question

Does every involution have a fixed point?

Proving that the limit of the integral of the following version of the topologist's sine curve exists, but that of the absolute value doesn't

Examples of finite-dimensional, semisimple, non-separable $k$-algebras?

Construct a function $f$ such that the above limit exists, although it fails to exist with $| f |$ in place of $f$ .

Examples about strictly concave functions with $f(x+z)=f(x)+f'(x)z$

Examples of Surjective Contractions on Reals

Example of Non-Affine Lipschitz Contractions

Counterexample/Example - continuity of parametric integral

Conjecture about the transitive closure of a relation $\mathcal R $ over a finite set $A$

Reflexivity, symmetry, and transitivity of difference operation between two binary relations

Example of $\alpha \in R$ s.t. $\alpha$ is not prime and $\alpha$ cannot be factored into a product of primes

Basic questions about the sobolev space $H^\infty(\mathbb{R})$

Example of two unbounded sets separated by a positive value that are not finitely additive

Example of a minimal equivalence relation on $A$ containing $R$

Reflexivity, symmetry, and transitivity of $S=\{(X,Y)\in\mathscr P(A)\times \mathscr P(A)|\forall x\in X\exists y\in Y(xRy)\}$

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