INVESTIGADORES
TREPODE Sonia Elisabet
artículos
Título:
Simply Connected Incidence Algebra
Autor/es:
IBRAHIM ASSEM; MARÍA INÉS PLATZECK; MARÍA JULIA REDONDO; SONIA TREPODE
Revista:
DISCRETE MATHEMATICS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2003 vol. 269 p. 333 - 355
ISSN:
0012-365X
Resumen:
It is known that the incidence algebra of a finite poset is not strongly simply connected if and only if its quiver contains a crown. We give a combinational condition on crowns which, if satisfied, forces the incidence algebra to be simply connected. The converse is not true, but we show that a simply connected incidence algebra which is not strongly simply connected always contains crowns satisfying this condition.
