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 A new book: the representation theory of finite monoids
 The uniform word problem for finite semigroups
 The first order theory of two endomorphisms of a finite dimensional vector space is undecidable
 Equalizers of free monoid morphisms, supports of rational power series and a question of Pin
 Isomorphism of oriented matroids from a semigroup viewpoint
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A new book: the representation theory of finite monoids
I am writing a book with Springer on the representation theory of finite monoids. A preliminary version is here. Comments and feedback are welcome.
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Combinatorics on Words
I am recording here some neat proofs of some theorems on combinatorics on words. No great originality is claimed.