00865nam0-22003251i-450 99000025444040332120201116133825.00-387-90305-4000025444FED01000025444(Aleph)000025444FED0100002544420001010d1978----km-y0itay50------baengUSy-------001yyMathematics todaytwelve informal essaysedited Lynn Arthur SteenNew YorkSpringer-Verlag1978VIII, 367 p. ill. 24 cmMatematicaSaggi510Steen,Lynn ArthurITUNINARICAUNIMARCBK99000025444040332109 039-0021046/LDINAEDINAEMathematics today55569UNINAING01