The present fourth volume recalls Hilbert's axioms from the Foundations of Geometry, and elaborates the theory of geometric constructions. Both extensions and restrictions of the classical Euclidean tools, straightedge and compass, are explained and investigated. One finds constructions by a marked ruler, which allows the duplication of the cube and angle trisection, on the other hand proofs for the impossibility of such constructions by the Euclidean tools or Hilbert tools. The connection...

A smart schoolmate invited each of our final class members to write about themselves. Using some short essays I enjoyed writing, I had gathered some material for such a booklet. Further sources are my music for flute and piano I have recorded together with pianist Thomas Turner, my completing of the flute sonata BWV 1032 of J.S. Bach, and fantasies about Plato, Mozart and Kafka.The description of professional growth, and the music playing which I have practiced with endurance durin...