ALGEBRAS C* 3 ALGEBRAS DE VON NEUMANN 3 C* ALGEBRAS 3 CONDITIONAL EXPECTATIONS OF FINITE INDEX ESPERANZAS CONDICIONALES DE INDICE FINITO 3 ESTADOS 3 GEOMETRIA DIFERENCIAL INFINITA 3 INFINITE DIMENSIONAL GEOMETRY 3 PESOS 3 STATES 3 VON NEUMANN ALGEBRAS 3 WEIGHTS 3