Eduard Wirsing was an outstanding number theorist. In his research he made significant contributions to various subfields of number theory and also published together with other eminent scientists (e.g., with the Fields Medalist Alan Baker as well as Don Zagier). The commemorative volume will include numerous number-theoretic papers on current research by well-known representatives as well as some personal recollections by companions of Wirsing.The topics range from arithmetical functions, continued fractions, elementary proofs of the prime number theorem, friable integers, the Goldbach...