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Keith Kearnes's user avatar
Keith Kearnes's user avatar
Keith Kearnes's user avatar
Keith Kearnes
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I am a member of the math department at the University of Colorado at Boulder.

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31
A group allowing exactly 7 group topologies
Aug 15, 2015
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30
Non isomorphic finite rings with isomorphic additive and multiplicative structure
Aug 22, 2015
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22
Varieties where every algebra is free
Jul 7, 2015
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20
Is every complete Boolean algebra isomorphic to the quotient of a powerset algebra?
Jul 22, 2018
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20
Does the hypergraph of subgroups determine a group?
Oct 6, 2018
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19
What are applications of commutativity theorems for rings?
Sep 2, 2015
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17
Are arbitrary nonempty intersections of principal filters principal?
Sep 1, 2022
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17
Is the Cartesian product of two finitely presented objects finitely presentable?
May 28, 2023
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16
Do commutative rings without unity have the IBN property?
Oct 17, 2018
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16
Are Gray codes in $\{0,1\}^n$ isomorphic?
Oct 18, 2018
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17
Does there exist a pair of infinite fields, the additive group of one isomorphic to the multiplicative group of the other?
15
Is every Boolean algebra a subalgebra of a free one?
14
When do $P$ $\subseteq$ $N$ $\subseteq$ $M$ and $P \cong M$ imply $N \cong M$?
13
Characteristic subgroups and automorphisms
12
$f(x) $ be the minimal polynomial of $a$ (algebraic element) over $\mathbb Q$ , let $b=f'(a) \in \mathbb Q(a)$ , then is $\mathbb Q(a)=\mathbb Q(b)$?