noun
arithmetic progression; arithmetic sequence
Mathematical term for a sequence where the difference between consecutive terms is constant. Equivalent to 等差数列 (とうさすうれつ), which is more common in modern Japanese.
算術級数は、隣り合う項の差が一定の数列です。
An arithmetic progression is a sequence where the difference between consecutive terms is constant.
Compound of 算術 (さんじゅつ, 'arithmetic') and 級数 (きゅうすう, 'series' or 'progression'). The term is a direct calque from Western mathematical terminology.