The palindromization map $\psi$ in a free monoid $A^{\*}$ was introduced in 1997
by the first author in the case of a binary alphabet $A$, and later extended by
other authors to arbitrary alphabets. Acting on infinite words, $\psi$
generates the …
In this paper we solve some open problems related to (pseudo)palindrome closure
operators and to the infinite words generated by their iteration, that is,
standard episturmian and pseudostandard words. We show that if
$\vartheta$ is an …
We consider involutory antimorphisms $\vartheta$ of a free monoid $A^{\*}$ and
their fixed points, called $\vartheta$-palindromes or pseudopalindromes. A
$\vartheta$-palindrome reduces to a usual palindrome when $\vartheta$ is the
reversal …