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Keith Kearnes's user avatar
Keith Kearnes's user avatar
Keith Kearnes's user avatar
Keith Kearnes
  • Member for 10 years, 5 months
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I am a member of the math department at the University of Colorado at Boulder.

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Top posts

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31
A group allowing exactly 7 group topologies
Aug 15, 2015
answer
30
Non isomorphic finite rings with isomorphic additive and multiplicative structure
Aug 22, 2015
answer
30
What are applications of commutativity theorems for rings?
Sep 2, 2015
answer
24
Varieties where every algebra is free
Jul 7, 2015
answer
21
Does the hypergraph of subgroups determine a group?
Oct 6, 2018
answer
20
Are finite groups with the same subgroup structures isomorphic?
Aug 3
answer
20
Is every complete Boolean algebra isomorphic to the quotient of a powerset algebra?
Jul 22, 2018
answer
17
What's the deal with De Morgan algebras and Kleene algebras?
Nov 23, 2024
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17
Is the Cartesian product of two finitely presented objects finitely presentable?
May 28, 2023
answer
17
Are arbitrary nonempty intersections of principal filters principal?
Sep 1, 2022

Top network posts

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19
Does there exist a pair of infinite fields, the additive group of one isomorphic to the multiplicative group of the other?
16
Is every Boolean algebra a subalgebra of a free one?
14
Characteristic subgroups and automorphisms
14
When do $P$ $\subseteq$ $N$ $\subseteq$ $M$ and $P \cong M$ imply $N \cong M$?
12
$f(x) $ be the minimal polynomial of $a$ (algebraic element) over $\mathbb Q$ , let $b=f'(a) \in \mathbb Q(a)$ , then is $\mathbb Q(a)=\mathbb Q(b)$?