In the+procedure+arbitration,+the omitted+observance+of the+contradictory+not+is+a+formal vice+mai+mai of+activities,+so the+nullity+che+n n n n not arise+ex+art.+829,+n.+9,+cod.+Proc.+Civ.+Implies+a+concrete+compression+of the+defense+ Ocessual:+it must, ie, ie,+to have them+to+at the+way+in++le+parts+they have been able+to confront+in+judgment+in+ratio+claims+ivi+explained,+the+the+vice+violation+of the+contradictory+it follows+concrete+imprison+of the+right+defense.