It was Marcel Grossman who introduced him to Riemman's work: https://en.wikipedia.org/wiki/Marcel_Grossmann https://en.wikipedia.org/wiki/Marcel_Grossmann Ther

It was Marcel Grossman who introduced him to Riemman's work: https://en.wikipedia.org/wiki/Marcel_Grossmann https://en.wikipedia.org/wiki/Marcel_Grossmann There is no evidence that his wife provided any of the "mathematical muscle needed for GR", nor is there reason to suspect that she would have been in a position to do so, since she was not a mathematician and had failed the undergraduate physics degree at the institute where she met Einstein (Einstein himself barely passed though). [0] https://www.springer.com/gp/book/9781402039997 https://www.springer.com/gp/book/9781402039997