Question

Ring of Sets vs Ring in Universal Algebra

score 1.6k · Answer 1 · 2026-03-22 10:53:01

1.6k

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Ring of Sets vs Ring in Universal Algebra

Published on 22 Mar 2026 - 10:53

score 254 · Answer 2 · 2016-11-05 05:29:02

254

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Is "generalized" singular homology/cohomology a thing? If not, why not?

Published on 05 Nov 2016 - 5:29

score 258 · Answer 3 · 2016-11-08 01:12:21

258

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Show that every variety of mono-unary algebras is defined by a single identity.

Published on 08 Nov 2016 - 1:12

score 76 · Answer 4 · 2016-11-11 17:59:04

76

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Software for Algebra

Published on 11 Nov 2016 - 17:59

score 161 · Answer 5 · 2016-11-12 16:21:16

161

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How to obtain all subalgebras of algebra?

Published on 12 Nov 2016 - 16:21

score 73 · Answer 6 · 2016-11-13 23:33:05

73

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Show every algebra can be embedded into each of it's ultrapowers

Published on 13 Nov 2016 - 23:33

score 95 · Answer 7 · 2016-11-14 00:36:00

95

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Let $H$ be a Heyting Algebra based on the $2 \times 3$ lattice. Find the subvarieties of $V(H)$

Published on 14 Nov 2016 - 0:36

score 137 · Answer 8 · 2016-11-14 05:15:16

137

Views

Embed an algerbra A into an ultraproduct of its finitely generated subalgebras.

Published on 14 Nov 2016 - 5:15

score 306 · Answer 9 · 2016-11-14 16:40:56

306

Views

Jónsson's lemma : A variety generated by finitely many finite lattices has finitely many subvarieties.

Published on 14 Nov 2016 - 16:40

score 209 · Answer 10 · 2026-03-25 10:57:25

209

Views

Lattice of congruences of a lattice is distributive

Published on 25 Mar 2026 - 10:57

score 49 · Answer 11 · 2016-11-15 00:03:08

49

Views

Let $A,B$ be finite SI-algebras and $V(A)$ be congruence-distributive. Then $V(A) = V(B) \iff A \simeq B$

Published on 15 Nov 2016 - 0:03

score 87 · Answer 12 · 2016-11-15 04:18:50

87

Views

For two classes $K_1,K_2$ of similar type, show $P_U(K_1 \cup K_2) = P_U(K_1) \cup P_U(K_2)$

Published on 15 Nov 2016 - 4:18

score 135 · Answer 13 · 2016-11-18 10:36:00

135

Views

Condition for an algebra to be finite, which does not use the underlying set

Published on 18 Nov 2016 - 10:36

score 88 · Answer 14 · 2016-11-21 09:18:43

88

Views

What is a general kind of tensor product of things with a commutative operation?

Published on 21 Nov 2016 - 9:18

score 93 · Answer 15 · 2016-11-21 10:40:45

93

Views

Cauchy sequence in universal algebra

Published on 21 Nov 2016 - 10:40

List Question

Ring of Sets vs Ring in Universal Algebra

Is "generalized" singular homology/cohomology a thing? If not, why not?

Show that every variety of mono-unary algebras is defined by a single identity.

Software for Algebra

How to obtain all subalgebras of algebra?

Show every algebra can be embedded into each of it's ultrapowers

Let $H$ be a Heyting Algebra based on the $2 \times 3$ lattice. Find the subvarieties of $V(H)$

Embed an algerbra A into an ultraproduct of its finitely generated subalgebras.

Jónsson's lemma : A variety generated by finitely many finite lattices has finitely many subvarieties.

Lattice of congruences of a lattice is distributive

Let $A,B$ be finite SI-algebras and $V(A)$ be congruence-distributive. Then $V(A) = V(B) \iff A \simeq B$

For two classes $K_1,K_2$ of similar type, show $P_U(K_1 \cup K_2) = P_U(K_1) \cup P_U(K_2)$

Condition for an algebra to be finite, which does not use the underlying set

What is a general kind of tensor product of things with a commutative operation?

Cauchy sequence in universal algebra

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