noun
action integral
Technical term in physics, specifically in Lagrangian and Hamiltonian mechanics, referring to the integral of the Lagrangian over time.
最小作用の原理では、作用積分が停留値をとる経路が実現される。
In the principle of least action, the path that makes the action integral stationary is realized.
Compound of 作用 (action) and 積分 (integral), directly translating the English physics term 'action integral'.