Abstract

This is volume ten in Reidel's Vienna Circle Collection. Twenty-six papers written during the period 1921-1978 are included, together with a bibliography of the author's works, a list of his principal dates, and a list of his fields of research. Seven papers are on logic and foundations of mathematics, twelve have to do with the improvement of mathematical notation and the teaching of mathematics, four are concerned with philosophical ramifications of geometric ideas, one is memoir about the author's relations with L. E. J. Brouwer during 1925-1929, and two treat issues in the foundations of economics. Nine of the selections date from 1939 and before and the rest from 1952 and after.