{"action":"created","issue":{"url":"https://api.github.com/repos/mattloper/chumpy/issues/16","repository_url":"https://api.github.com/repos/mattloper/chumpy","labels_url":"https://api.github.com/repos/mattloper/chumpy/issues/16/labels{/name}","comments_url":"https://api.github.com/repos/mattloper/chumpy/issues/16/comments","events_url":"https://api.github.com/repos/mattloper/chumpy/issues/16/events","html_url":"https://github.com/mattloper/chumpy/issues/16","id":303642272,"node_id":"MDU6SXNzdWUzMDM2NDIyNzI=","number":16,"title":"Forward or Backward mode autodiff?","user":{"login":"stewartdent","id":25042998,"node_id":"MDQ6VXNlcjI1MDQyOTk4","avatar_url":"https://avatars2.githubusercontent.com/u/25042998?v=4","gravatar_id":"","url":"https://api.github.com/users/stewartdent","html_url":"https://github.com/stewartdent","followers_url":"https://api.github.com/users/stewartdent/followers","following_url":"https://api.github.com/users/stewartdent/following{/other_user}","gists_url":"https://api.github.com/users/stewartdent/gists{/gist_id}","starred_url":"https://api.github.com/users/stewartdent/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stewartdent/subscriptions","organizations_url":"https://api.github.com/users/stewartdent/orgs","repos_url":"https://api.github.com/users/stewartdent/repos","events_url":"https://api.github.com/users/stewartdent/events{/privacy}","received_events_url":"https://api.github.com/users/stewartdent/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-03-08T21:41:15Z","updated_at":"2018-06-26T07:33:16Z","closed_at":null,"author_association":"NONE","body":"Is chumpy using Forward mode or Reverse mode automatic differentiation? A quick browse seems like forward mode..."},"comment":{"url":"https://api.github.com/repos/mattloper/chumpy/issues/comments/400209542","html_url":"https://github.com/mattloper/chumpy/issues/16#issuecomment-400209542","issue_url":"https://api.github.com/repos/mattloper/chumpy/issues/16","id":400209542,"node_id":"MDEyOklzc3VlQ29tbWVudDQwMDIwOTU0Mg==","user":{"login":"SelvamArul","id":7311434,"node_id":"MDQ6VXNlcjczMTE0MzQ=","avatar_url":"https://avatars3.githubusercontent.com/u/7311434?v=4","gravatar_id":"","url":"https://api.github.com/users/SelvamArul","html_url":"https://github.com/SelvamArul","followers_url":"https://api.github.com/users/SelvamArul/followers","following_url":"https://api.github.com/users/SelvamArul/following{/other_user}","gists_url":"https://api.github.com/users/SelvamArul/gists{/gist_id}","starred_url":"https://api.github.com/users/SelvamArul/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SelvamArul/subscriptions","organizations_url":"https://api.github.com/users/SelvamArul/orgs","repos_url":"https://api.github.com/users/SelvamArul/repos","events_url":"https://api.github.com/users/SelvamArul/events{/privacy}","received_events_url":"https://api.github.com/users/SelvamArul/received_events","type":"User","site_admin":false},"created_at":"2018-06-26T07:33:16Z","updated_at":"2018-06-26T07:33:16Z","author_association":"NONE","body":"The function computing the automatic differentiation has implementation of both forward and backward mode [here](https://github.com/mattloper/chumpy/blob/58a76a8638a3144a55e4f06dd1e894f44b056c66/chumpy/ch.py#L729).\r\n\r\nThe [documentation](http://files.is.tue.mpg.de/black/papers/chumpy_tutorial.pdf) (sec 2.1) says \"Chumpy is primarily a forward-mode, Jacobian producing autodifferentiation framework. Reverse-mode is partially supported, but much slower than it should be because some basic functions need implementation.\""}}
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