Question

Is the set of identities of a single binary operation densely ordered under this strict partial order?

score 37 · Answer 1 · 2022-06-18 15:31:26

37

Views

Is the set of identities of a single binary operation densely ordered under this strict partial order?

Published on 18 Jun 2022 - 15:31

score 107 · Answer 2 · 2026-02-23 21:13:46

107

Views

Is there a magma with this property?

Published on 23 Feb 2026 - 21:13

score 115 · Answer 3 · 2026-04-01 08:06:14

115

Views

Is every subset of the natural numbers that is closed under successor also closed under addition?

Published on 01 Apr 2026 - 8:06

score 161 · Answer 4 · 2026-03-30 12:25:58

161

Views

Which ultrafilters are (sort-of) commutators?

Published on 30 Mar 2026 - 12:25

score 169 · Answer 5 · 2022-07-25 09:05:28

169

Views

A question about Birkhoff's Theorem and subdirectly irreducible algebras

Published on 25 Jul 2022 - 9:05

score 85 · Answer 6 · 2022-08-16 23:37:31

85

Views

Is this a basis for the equational identities of the structure $(\mathbb{N};+,\cdot,0,1)$?

Published on 16 Aug 2022 - 23:37

score 99 · Answer 7 · 2026-03-26 01:14:54

99

Views

Exercise about map objects $Y^{1}$ ("Conceptual Mathematics Second Edition", p.314, Article V Map objects, Exercise 3)

Published on 26 Mar 2026 - 1:14

score 191 · Answer 8 · 2022-08-30 17:51:15

191

Views

Do "equi-homomorphic" group elements lie in the same orbit?

Published on 30 Aug 2022 - 17:51

score 40 · Answer 9 · 2026-02-23 21:18:43

40

Views

An equational basis for the variety generated by the following class of magmas.

Published on 23 Feb 2026 - 21:18

score 39 · Answer 10 · 2022-09-19 17:48:43

39

Views

Is the class of image mappings axiomatizable by equations and subset relations?

Published on 19 Sep 2022 - 17:48

score 111 · Answer 11 · 2022-09-30 04:52:26

111

Views

Can "degrees of preservability" over a theory have greatest lower bounds (nontrivially)?

Published on 30 Sep 2022 - 4:52

score 39 · Answer 12 · 2022-10-08 15:38:53

39

Views

The commutator is meet semidistributive in the second variable

Published on 08 Oct 2022 - 15:38

score 36 · Answer 13 · 2022-10-10 00:29:37

36

Views

The analogue, for general partial orders, of commutative idempotent semigroups for semilattices

Published on 10 Oct 2022 - 0:29

score 102 · Answer 14 · 2022-10-10 22:43:39

102

Views

Do we need closed (or open) sets?

Published on 10 Oct 2022 - 22:43

score 91 · Answer 15 · 2022-10-11 01:02:29

91

Views

Is subtraction term-definable from addition in the reals?

Published on 11 Oct 2022 - 1:02

List Question

Is the set of identities of a single binary operation densely ordered under this strict partial order?

Is there a magma with this property?

Is every subset of the natural numbers that is closed under successor also closed under addition?

Which ultrafilters are (sort-of) commutators?

A question about Birkhoff's Theorem and subdirectly irreducible algebras

Is this a basis for the equational identities of the structure $(\mathbb{N};+,\cdot,0,1)$?

Exercise about map objects $Y^{1}$ ("Conceptual Mathematics Second Edition", p.314, Article V Map objects, Exercise 3)

Do "equi-homomorphic" group elements lie in the same orbit?

An equational basis for the variety generated by the following class of magmas.

Is the class of image mappings axiomatizable by equations and subset relations?

Can "degrees of preservability" over a theory have greatest lower bounds (nontrivially)?

The commutator is meet semidistributive in the second variable

The analogue, for general partial orders, of commutative idempotent semigroups for semilattices

Do we need closed (or open) sets?

Is subtraction term-definable from addition in the reals?

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