変へん分ぶん法ほう

noun

calculus of variations

Mathematical field dealing with finding functions that optimize functionals. Used in pure and applied mathematics.

• 変へん分ぶん法ほうは、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数すう学がくの一いち分ぶん野やです。

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

noun

variational method

In quantum mechanics, an approximation technique for finding ground states and energies. Often used in computational physics.

• 量りょう子し力りき学がくでは、変へん分ぶん法ほうを用もちいて基き底てい状じょう態たいのエネルギーを近きん似じ的てきに求もとめることができます。

  In quantum mechanics, the variational method can be used to approximately determine the ground state energy.