00617nam a2200205 a 450000100060000000300080000600500170001400800410003103500190007204000290009104100080012008200250012810000310015324500680018425000120025226000670026430000270033165000240035865000290038251685BD-RjUL20211209075711.0010916s19521927enk           000 0 eng d  a(BD-RjUL)51805  aNZOCbengcBD-RjULdADFA  aeng  223a515.37bVEI 19521 aVeblen, Oswaldd1880-1960.10aInvariants of quadratic differential forms /cby Oswald Veblen.  a1st ed.  aCambridge :bCambridge University Press,c1927, [Reprint 1952]  aviii, 102 p. ;c22 cm. 0aDifferential forms. 0aDifferential invariants.