Lev Semenovic Pontrjagin (1908) is one of the outstanding figures in
20th century mathematics. In a long career he has made fundamental con-
tributions to many branches of mathematics, both pure and applied. He
has received every honor that a grateful government can bestow. Though
in no way constrained to do so, he has through the years taught
mathematics courses at Moscow State University. In the year 1975 he set
himself the task of writing a series of books on secondary school and
beginning university mathematics. In his own words, "I wished to set
forth the foundations of higher mathematics in a form that would have
been accessible to myself as a lad, but making use of all my experience
as a scientist and a teacher, ac- cumulated over many years. " The
present volume is a translation of the first two out of four moderately
sized volumes on this theme planned by Pro- fessor Pontrjagin. The book
begins at the beginning of modern mathematics, analytic ge- ometry in
the plane and 3-dimensional space. Refinements about limits and the
nature of real numbers come only later. Many concrete examples are
given; these may take the place of formal exercises, which the book does
not provide. The book continues with careful treatment of
differentiation and integration, of limits, of expansions of elementary
functions in power se- ries.