Question

Proof by contradiction using counterexample

score 5.9k · Answer 1 · 2014-07-17 23:16:11

5.9k

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Proof by contradiction using counterexample

Published on 17 Jul 2014 - 23:16

score 75 · Answer 2 · 2014-07-18 09:52:19

75

Views

If the quotient by the $i$th center is cyclic, does it follow that the original group is abelian?

Published on 18 Jul 2014 - 9:52

score 4.7k · Answer 3 · 2014-07-19 08:59:12

4.7k

Views

If $A^2 = B^2$, then $A=B$ or $A=-B$

Published on 19 Jul 2014 - 8:59

score 97 · Answer 4 · 2014-07-20 22:15:24

97

Views

Free cyclic subgroups in a non-abelian group

Published on 20 Jul 2014 - 22:15

score 509 · Answer 5 · 2014-07-22 05:26:45

509

Views

Is an arbitrary group generated by a traversal of the conjugacy classes?

Published on 22 Jul 2014 - 5:26

score 62 · Answer 6 · 2026-03-30 15:36:18

62

Views

Pair of functions $F(x)$ (transcendental),$A(x)$ (algebraic) with expanded series of positive integer coefficient linked by derivative

Published on 30 Mar 2026 - 15:36

score 100 · Answer 7 · 2026-03-28 01:14:59

100

Views

"Full"-Simplification of arbitrary mathematical expressions

Published on 28 Mar 2026 - 1:14

score 716 · Answer 8 · 2026-03-25 13:54:41

716

Views

Semidirect products as (amalgamated) free product

Published on 25 Mar 2026 - 13:54

score 8.7k · Answer 9 · 2026-03-28 01:24:07

8.7k

Views

What are some conceptualizations that work in mathematics but are not strictly true?

Published on 28 Mar 2026 - 1:24

score 271 · Answer 10 · 2026-03-25 07:43:05

271

Views

Separability of conjugacy classes in conjugacy separable semidirect products.

Published on 25 Mar 2026 - 7:43

score 59 · Answer 11 · 2026-03-27 00:57:03

59

Views

Linear bijection non-preserving Hausdorff propery

Published on 27 Mar 2026 - 0:57

score 17.7k · Answer 12 · 2026-03-26 04:33:06

17.7k

Views

Polygons with equal area and perimeter but different number of sides?

Published on 26 Mar 2026 - 4:33

score 892 · Answer 13 · 2026-03-26 04:34:41

892

Views

Constructing a family of distinct curves with identical area and perimeter

Published on 26 Mar 2026 - 4:34

score 239 · Answer 14 · 2026-03-28 13:41:39

239

Views

Example of ring $R$ with ideals $I\neq J$ such that $R/I \cong R/J$ as modules

Published on 28 Mar 2026 - 13:41

score 591 · Answer 15 · 2014-07-25 16:51:41

591

Views

Homomorphic image of intersection equals intersection of homomorphic images?

Published on 25 Jul 2014 - 16:51

List Question

Proof by contradiction using counterexample

If the quotient by the $i$th center is cyclic, does it follow that the original group is abelian?

If $A^2 = B^2$, then $A=B$ or $A=-B$

Free cyclic subgroups in a non-abelian group

Is an arbitrary group generated by a traversal of the conjugacy classes?

Pair of functions $F(x)$ (transcendental),$A(x)$ (algebraic) with expanded series of positive integer coefficient linked by derivative

"Full"-Simplification of arbitrary mathematical expressions

Semidirect products as (amalgamated) free product

What are some conceptualizations that work in mathematics but are not strictly true?

Separability of conjugacy classes in conjugacy separable semidirect products.

Linear bijection non-preserving Hausdorff propery

Polygons with equal area and perimeter but different number of sides?

Constructing a family of distinct curves with identical area and perimeter

Example of ring $R$ with ideals $I\neq J$ such that $R/I \cong R/J$ as modules

Homomorphic image of intersection equals intersection of homomorphic images?

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