### Appendix A. The Logical and Arithmetical Doctrines of Frege

- § 475. Principal points in Frege's doctrines
- § 476. Meaning and indication
- § 477. Truth-values and judgment
- § 478. Criticism
- § 479. Are assumptions proper names for the true or the false?
- § 480. Functions
- § 481. Begriff and Gegenstand
- § 482. Recapitulation of theory of propositional functions
- § 483. Can concepts be made logical subjects?
- § 484. Ranges
- § 485. Definition of
*∈*and of*relation* - § 486. Reasons for an extensional view of classes
- § 487. A class which has only one member is distinct from its only member
- § 488. Possible theories to account for this fact
- § 489. Recapitulation of theories already discussed
- § 490. The subject of a proposition may be plural
- § 491. Classes having only one member
- § 492. Theory of types
- § 493. Implication and symbolic logic
- § 494. Definition of cardinal numbers
- § 495. Frege's theory of series
- § 496. Kerry's criticisms of Frege

### Appendix B. The Doctrine of Types

The Principles of Mathematics was written by Bertrand Russell, and published in in 1903. It is now available in the Public Domain.