変へん分ぶん学がく

noun

calculus of variations

A field of mathematical analysis dealing with maximizing or minimizing functionals, typically involving integrals.

• 変へん分ぶん学がくは最さい適てき制せい御ぎょ理り論ろんの基き礎そとなる分ぶん野やだ。

  The calculus of variations is a field that forms the basis of optimal control theory.