2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61796A free wreath product construction of a Hopf algebra (or of a Woronowicz algebra) by Wang's quantum permutation group is done. It provides new examples of quantum groups and is useful to describe the quantum automorphism group of the n-times disjoint union of a finite connected graph.18 pagesQuantum AlgebraRings and Algebras16W30; 46L89text