G. H. Hardy

Hardy's defence of pure mathematics, written in 1940 near the end of his career: why a mathematician's work is creative, why its value is aesthetic rather than useful, and what it means to have spent a life on it. Twenty-nine short sections, with Hardy's note on the criticisms of C. D. Broad and C. P. Snow at the end. This is the first edition (Cambridge University Press, 1940), Hardy's essay alone, without the Foreword added in 1967.

Hardy's introduction to analysis for students in their first university year: real numbers, functions of real variables, complex numbers, limits, continuity, derivatives and integrals, the convergence of infinite series and integrals, and the logarithmic, exponential and circular functions, with over a thousand examples. This is the third edition (Cambridge University Press, 1921), in 237 numbered sections with Hardy's examples, miscellaneous examples at the end of each chapter and four appendices.