%0 Journal Article %T Pl\:ucker relations and spherical varieties: application to model varieties %A Rocco Chirivi' %A Andrea Maffei %J Mathematics %D 2012 %I arXiv %X A general framework for the reduction of the equations defining classes of spherical varieties to (maybe infinite dimensional) grassmannians is proposed. This is applied to model varieties of type A, B and C; in particular a standard monomial theory for these varieties is presented. %U http://arxiv.org/abs/1211.3918v2