You’ve probably heard many crazy ideas, and most of the time, they are just that, crazy. But once in a while one of those crazy ideas turns out to be correct. Feynman’s idea of the path integral was one of those crazy ideas. In this blog, you will see how Feynman put his "crazy" idea into a mathematical formulation with results that were equivalent to QFT.

Path Integral SimplifiedAny comments would be appreciated.