versión impresa ISSN 0716-0917
ASSEM, I; BUSTAMANTE, J. C.; CASTONGUAY, D y NOVOA, C. A NOTE ON THE FUNDAMENTAL GROUP OF A ONE-POINT EXTENSION. Proyecciones (Antofagasta) [online]. 2005, vol.24, n.1, pp. 79-87. ISSN 0716-0917. http://dx.doi.org/10.4067/S0716-09172005000100007.
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
Palabras llave : Fundamental groups; bound quivers; presentations of algebras.