noun
pure mathematics
The branch of mathematics studied for its own sake, without immediate practical application. Often contrasted with 応用数学 (applied mathematics).
See also: 応用数学
彼は純粋数学の研究者だ。
He is a researcher in pure mathematics.
純粋数学と応用数学の境界はあいまいになりつつある。
The boundary between pure and applied mathematics is becoming blurred.