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Jeremy Reizenstein authored
Summary: Issue #119. The function `sqrt(max(x, 0))` is not convex and has infinite gradient at 0, but 0 is a subgradient at 0. Here we implement it in such a way as to give 0 as the gradient. Reviewed By: gkioxari Differential Revision: D24306294 fbshipit-source-id: 48d136faca083babad4d64970be7ea522dbe9e09
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