By Richard Courant

From the reports: "Volume 1 covers a simple path in actual research of 1 variable and Fourier sequence. it truly is well-illustrated, well-motivated and intensely well-provided with a large number of strangely necessary and obtainable workouts. (...) There are 3 features of Courant and John within which it outshines (some) contemporaries: (i) the vast old references, (ii) the bankruptcy on numerical tools, and (iii) the 2 chapters on physics and geometry. The routines in Courant and John are prepare purposefully, and both glance numerically attention-grabbing, or are intuitively major, or result in purposes. it's the most sensible textual content recognized to the reviewer for someone attempting to make an research direction much less summary. (...)" The Mathematical Gazette (75.1991.471)

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