00722nam a22002291a 4500 1/18492 020114s1975 enk b 1 0 eng d 0125966504 19032 DLC GR-PeUP 515.72 RO Rota, Gian-Carlo. Finite operator calculus / Gian-Carlo Rota New York : Academic Press, 1975 159 p. ; 24 cm. Includes bibliographical references & index Combinatorial enumeration problems. Linear operators. Generating functions. Commutative rings. Valuation theory. INST UNIPILB MAIN 20040709 515.72 RO 00137549 00137549 LOAN 0 1