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Paper detail

A palindromization map for the free group

We define a self-map Pal: F_2 --> F_2 of the free group on two generators a, b, using automorphisms of F_2 that form a group isomorphic to the braid group B_3. The map Pal restricts to de Luca's right iterated palindromic closure on the submonoid generated by a, b, and is continuous for the profinite topology on F_2. The values of Pal are palindromes and coincide with the elements g of F_2 such that abg is conjugate to bag.

preprint2008arXivOpen access
Christian KasselChristophe Reutenauer
math.COmath.GR
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Christian KasselChristophe Reutenauer

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