## Über formal unentscheidbare Sätze der Principia Mathematica undver wandter Systeme I. Offprint from: Monatshefte für Mathematik und Physik 38, 1931. [Bound with:] Über die Vollständigkeit der Axiome des logischen Funktionenkalküls. Offprint from: Monatshefte für Mathematik und Physik 37, 1930. Leipzig: Akademische Verlagsgesellschaft, 1931, 1930. [Bound with:] VON WRIGHT, Georg Henrik. Typed letter signed ‘Georg Henrik von Wright’ in Swedish on Academy of Finland letterhead.

Leipzig: Akademische Verlagsgesellschaft, 1931; 1930. First edition, extremely rare author’s presentation offprint, of Gödel’s famous incompleteness theorem, “one of the major contributions to modern scientific thought” (Nagel & Newman). “Every system of arithmetic contains arithmetical propositions, by which is meant propositions concerned solely with relations between whole numbers, which can..... More

Item #4559