noun
applied mathematics
The branch of mathematics that deals with practical applications, as opposed to pure mathematics.
彼は大学で応用数学を専攻している。
He is majoring in applied mathematics at university.
純粋数学 is pure mathematics, focusing on abstract theory, while 応用数学 is applied mathematics, focusing on practical use.
Compound of 応用 (application) and 数学 (mathematics).