Tara B

4,088 reputation

930

bio	website
	location	Scotland
	age	30
visits	member for	1 year, 2 months
	seen	May 16 at 22:36
stats	profile views	910

I do research on groups, semigroups, and especially interactions between algebra and formal language theory. My non-research interests include combinatorics, elementary number theory and topology.

	4,088 reputation	bio	website		visits	member for	1 year, 2 months
930 badges		location	Scotland		seen	May 16 at 22:36

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3 Questions

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122

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Why is a matrix $A\in \operatorname{SL}(2,\mathbb{R})$ with $|\operatorname{tr}(A)|<2$ conjugate to a matrix of the following form?

linear-algebra

may 15 '12 at 12:16 Gigili 3,151

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101

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Name for a function whose image has smaller cardinality than its domain

elementary-set-theory semigroups

mar 18 at 13:52 Boris Novikov 4,761

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Finitely generated subgroups of direct limits of groups

group-theory category-theory

apr 15 at 23:45 Martin Brandenburg 22.5k