Design of a Language for Cosmic Intercourse, Part 1. (Studies in Logic and the Foundations of Mathematics.) By Dr. Hans Freudenthal. Pp. v + 224. (Amsterdam: North-Holland Publishing Co., 1960.) 45s.
When a new mathematical idea is found to be useful, a superstructure of mathematics rises from it. Later the original idea may prove to be shaky, but it must be repaired without destroying the ...