(mathematics) a progression of terms whose reciprocals form an arithmetic progression

a series of chords that follows principles and guidelines defined by the overtone series and tradions of the common practice period, generally within a tonal framework. This also is refered to as harmonic function. In the tonal systm, progressions occur when root movements are the following general intervals: Up by Second Down by Third Up by Fourth (or down by fifth) except V and vii°, which do not resolve to iii (or III in minor) See also the section on Basic Harmonic Function for more details.

The movement from one chord to another, usually in terms of their function.

Movement from one chord to the next; a succession of chords or a chord progression.

A succession of individual chords or harmonies that form larger units of phrases, sections, or compositions.

The succession of chords in a piece of music. The rate at which they change is called harmonic rhythm.