"For many years Serge Lang has given talks to undergraduates on selected topics in mathematics which could be extracted at a level understandable by students who have had calculus."--BOOK JACKET. "Written in a conversational tone, Lang now presents a collection of those talks as a book. The talks could be given by faculty, but even better, they may be given by students in seminars run by the students themselves."--BOOK JACKET.

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