What is another word for calculus of variations?
Pronunciation: [kˈalkjʊləs ɒv vˌe͡əɹɪˈe͡ɪʃənz] (IPA) 
The calculus of variations is a mathematical subject that deals with finding the best path or function that optimizes a certain quantity or functional. There are various terms that can be used as synonyms for the calculus of variations. Some of these include the optimal control theory, the variational calculus, and the Euler-Lagrange equations. The optimal control theory emphasizes the importance of finding the best control that leads to the desired output. The variational calculus, on the other hand, considers the function itself, rather than the control, as the variable to be optimized. Lastly, the Euler-Lagrange equations provide a framework for obtaining the global minimum of a functional. These terms are used interchangeably in mathematics and physics, depending on the application and context of the problem.
