annali di mat ser ii carroll lewis ''euclid modern rivals'' new york barnes noble reprint h coxeter ''non euclidean geometry'' university toronto press reissued mathematical association america jeremy gray ''ideas space euclidean non euclidean relativistic'' nd edition clarendon press greenberg marvin jay ''euclidean non euclidean geometries development history'' th ed new york w h freeman morris kline ''mathematical thought ancient modern times'' chapter non euclidean geometry pp oxford university press bernard h lavenda new perspective
Formal science Mathematics Pure mathematics Geometry Non-Euclidean geometry