調ちょう和わ数すう列れつ

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Meanings

1

noun

harmonic progression

mathematics

Mathematical term for a sequence whose reciprocals form an arithmetic progression.

調tune, tone, meter

和harmony, Japanese style, peace

数number, strength, fate

列file, row, rank

等とう差さ数すう列れつ
Arithmetic progression; the reciprocals of a harmonic progression form an arithmetic progression.
等とう比ひ数すう列れつ
Geometric progression; a different type of sequence where each term is multiplied by a constant ratio.

Compound of 調和 (harmony) and 数列 (numerical sequence). The term is a direct calque from English 'harmonic progression'.