Functional integration successfully entered physics as path integrals in the 1942 Ph. D. dissertation of Richard P. Feynman, but it made no sense at all as a mathematical definition.

职能的综合在理查页范曼的1942哲学博士长篇论文成功进入物理学作为道路积分，但是它确实没有意义作为一个数学定义。