Resumen de A note on the fundamental group of a one-point extension

Ibrahim Assem, Juan Carlos Bustamante, Diane Castonguay, Cristian Novoa Bustos

• In this note, we consider an algebra A which is a one-point extension of another algebra B and we study the morphism of fundamental groups induced by the inclusion of (the bound quiver of ) B into (that of ) A. Our main result says that the cokernel of this morphism is a free group and we prove some consequences from this fact.