master
Update adadelta.md
add machine translation of raw 11.5--11.11
【Paddle】add discussion for paddle chap 9-12 (#1226)
fix typo and improve translation in chapter_optimization/ (#1080)
Update convexity.md
PyTorch: Fix meshgrid indexing
add opt first 4 sections
[PaddlePaddle] Merge master into Paddle branch (#1186)
PyTorch: Fix SGD ValueError