pytorch

e46e572b - Add backward pass notes for eig() and symeig()

Add backward pass notes for eig() and symeig() Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/15929 Differential Revision: D13626158 Pulled By: soumith fbshipit-source-id: ab869560926036053c39d20b217ccef8767e7d3f