Key Concepts

This chapter introduces four foundational concepts related to nonretrogradable rhythms:

1. Retrograde Rhythms - Temporal reversal of rhythmic patterns creating inversions in the temporal domain
2. Nonretrogradable Rhythms (Palindromic Rhythms) - Symmetrical structures that read identically forwards and backwards
3. Relation of Nonretrogradable Rhythms and Modes of Limited Transpositions - Fundamental analogy between temporal and pitch-class symmetries
4. Central Common Values - Pivot points serving as axes of symmetry in palindromic structures