A Mathematician

A mathematician made some basic error in his reasoning, but didn’t notice the error and finally formed some equation or other following on from the error. This equation received great acclaim, became the cornerstone of an entire world, a mathematical ideology. Someone did notice the error, it was even quite obvious, and he tried to point the mistake out, but amidst all the acclaim and excitement he found to his surprise he was ignored and even - after he tried in the interests of truth to persist in his pointing out - essentially ended up cast out from decent mathematical society.