Question

In a dagger category, what do we call an arrow $f$ such that $f \circ f^\dagger \circ f = f$?

score 107 · Answer 1 · 2026-03-25 14:25:15

107

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In a dagger category, what do we call an arrow $f$ such that $f \circ f^\dagger \circ f = f$?

Published on 25 Mar 2026 - 14:25

score 1.4k · Answer 2 · 2026-03-28 00:56:19

1.4k

Views

Findout if $\min(x,y)$ and $\max(x,y)$ are semigroup, monoid or group

Published on 28 Mar 2026 - 0:56

score 39 · Answer 3 · 2014-02-23 20:11:39

39

Views

Proof of commutativity for topological I-semigroups

Published on 23 Feb 2014 - 20:11

score 320 · Answer 4 · 2026-03-28 04:40:59

320

Views

positive integer polynomial under the usual polynomial multiplication

Published on 28 Mar 2026 - 4:40

score 544 · Answer 5 · 2026-03-27 13:11:26

544

Views

Are these adjoint functors to/from the category of monoids with semigroup homomorphisms?

Published on 27 Mar 2026 - 13:11

score 307 · Answer 6 · 2017-04-15 14:34:52

307

Views

Showing $aS=S=Sa$ for all $a\in S$ using a specific definition of a group $S$.

Published on 15 Apr 2017 - 14:34

score 526 · Answer 7 · 2017-04-15 16:28:34

526

Views

Exercise 1.9.3 of Howie's "Fundamentals of Semigroup Theory".

Published on 15 Apr 2017 - 16:28

score 268 · Answer 8 · 2017-04-15 17:08:23

268

Views

There are $3{,}684{,}030{,}417$ different semigroups of order $8$.

Published on 15 Apr 2017 - 17:08

score 77 · Answer 9 · 2026-03-26 12:41:13

77

Views

Semigroup algebra of an idempotent semigroup

Published on 26 Mar 2026 - 12:41

score 458 · Answer 10 · 2017-04-16 10:46:57

458

Views

An equivalent condition for a rectangular band.

Published on 16 Apr 2017 - 10:46

score 129 · Answer 11 · 2026-03-27 05:36:39

129

Views

General properties? of divisibility of semigroups

Published on 27 Mar 2026 - 5:36

score 126 · Answer 12 · 2017-04-18 10:56:36

126

Views

The image under a semigroup morphism of a right ideal is a right ideal.

Published on 18 Apr 2017 - 10:56

score 205 · Answer 13 · 2026-03-25 21:22:15

205

Views

Iterative Convergence Formulation for Linear Fractional Transformation with Rational Coefficients

Published on 25 Mar 2026 - 21:22

score 78 · Answer 14 · 2026-03-27 14:21:35

78

Views

Powerset extension of a binary operation of a semigroup

Published on 27 Mar 2026 - 14:21

score 59 · Answer 15 · 2026-03-23 00:35:32

59

Views

Showing $\lvert\mathscr{B}_X\rvert=2^{n^2}$.

Published on 23 Mar 2026 - 0:35

List Question

In a dagger category, what do we call an arrow $f$ such that $f \circ f^\dagger \circ f = f$?

Findout if $\min(x,y)$ and $\max(x,y)$ are semigroup, monoid or group

Proof of commutativity for topological I-semigroups

positive integer polynomial under the usual polynomial multiplication

Are these adjoint functors to/from the category of monoids with semigroup homomorphisms?

Showing $aS=S=Sa$ for all $a\in S$ using a specific definition of a group $S$.

Exercise 1.9.3 of Howie's "Fundamentals of Semigroup Theory".

There are $3{,}684{,}030{,}417$ different semigroups of order $8$.

Semigroup algebra of an idempotent semigroup

An equivalent condition for a rectangular band.

General properties? of divisibility of semigroups

The image under a semigroup morphism of a right ideal is a right ideal.

Iterative Convergence Formulation for Linear Fractional Transformation with Rational Coefficients

Powerset extension of a binary operation of a semigroup

Showing $\lvert\mathscr{B}_X\rvert=2^{n^2}$.

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