- § 276. Continuity is a purely ordinal notion
- § 277. Cantor's ordinal definition of continuity
- § 278. Only ordinal notions occur in this definition
- § 279. Infinite classes of integers can be arranged in a continuous series
- § 280. Segments of general compact series
- § 281. Segments defined by fundamental series
- § 282. Two compact series may be combined to form a series which is not compact

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