Modify Cholesky derivative (#19116)
Summary:
The derivative of the Cholesky decomposition was previously a triangular matrix.
Changelog:
- Modify the derivative of Cholesky from a triangular matrix to symmetric matrix
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19116
Differential Revision: D14935470
Pulled By: ezyang
fbshipit-source-id: 1c1c76b478c6b99e4e16624682842cb632e8e8b9
