Computation of nielsen and reidemeister coincidence numbers for multiple maps

Abstract

Let f1, …, fk: M → N be maps between closed manifolds, N(f1, …, fk ) and R(f1, …, fk ) be the Nielsen and the Reideimeister coincidence numbers, respectively. In this note, we relate R(f1, …, fk ) with R(f1, f2 ), …, R(f1, fk ). When N is a torus or a nilmanifold, we compute R(f1, …, fk ) which, in these cases, is equal to N(f1, …, fk ).