Automorphisms of the Artin group of type $D_5$

Abstract

For the Artin group of type $D_5$, we determine its automorphism group and the automorphism group of its quotient by the center. This settles the only remaining case, $n=5$, in the classification of automorphisms of Artin groups of spherical type $D_n$.

11 pages, 1 figure; v2: the spelling of the first author's name is corrected