Table of contents
- 20.1 Waring’s Problem: the Numbers g(k) and U(k)
- 20.2 Squares
- 20.3 Second Proof of Theorem 366
- 20.4 Third and Fourth Proofs of Theorem 366
- 20.5 The Four-Square Theorem
- 20.6 Quaternions
- 20.7 Preliminary Theorems about Integral Quaternions
- 20.8 The Highest Common Right-Hand Divisor of Two Quaternions
- 20.9 Prime Quaternions and the Proof of Theorem 370
- 20.10 The Values of g(2) and G(2)
- 20.11 Lemmas for the Third Proof of Theorem 369
- 20.12 Third Proof of Theorem 369: the Number of Representations
- 20.13 Representation by a Larger Number of Squares