Laws of Form by G Spencer-Brown 5th English edition: At last this all-time classic has been reset, allowing more detailed explanations and fresh insight. There are seven appendices, doubling the size of the original book. Most exiting of all is the first ever proof of the famous Riemann hypothesis. To have, in print, under your hands and before your own eyes, what defied the best minds for a century and a half, is an experience not to be denied.

InhaltsangabeContents: Preface to the fifth English Edition Preface to the first American edition Preface Introduction A note on the mathematical approach 1 The form 2 Forms taken out of the form 3 The conception of calculation 4 The primary arithmetic 5 A calculus taken out of the calculus 6 The primary algebra 7 Theorems of the second order 8 Reuniting the two orders 9 Completeness 10 Independence 11 Equations of the second degree 12 Reentry into the form Notes Appendix 1. Proofs of Sheffer's postulates Appendix 2. The calculus interpreted for logic Index of references Index of forms Appendix 3. Bertrand Russell and the Laws of Form Introduction to Appendices 4 & 5 Appendix 4. An algebra for the natural numbers Appendix 5. Two proofs of the four-colour map theorem My simplest proof of the four-colour map theorem Appendix 6. Last word Appendix 7. The prime limit theorem Appendix 8. Primes between squares Appendix 9. A proof of Riemann's hypothesis via Denjoy's equivalent theorem Closing remarks