{"action":"created","issue":{"url":"https://api.github.com/repos/scipy/scipy/issues/6488","repository_url":"https://api.github.com/repos/scipy/scipy","labels_url":"https://api.github.com/repos/scipy/scipy/issues/6488/labels{/name}","comments_url":"https://api.github.com/repos/scipy/scipy/issues/6488/comments","events_url":"https://api.github.com/repos/scipy/scipy/issues/6488/events","html_url":"https://github.com/scipy/scipy/issues/6488","id":170985174,"number":6488,"title":"Numerically significant inconsistencies between spsolve and solve","user":{"login":"mitar","id":585279,"avatar_url":"https://avatars.githubusercontent.com/u/585279?v=3","gravatar_id":"","url":"https://api.github.com/users/mitar","html_url":"https://github.com/mitar","followers_url":"https://api.github.com/users/mitar/followers","following_url":"https://api.github.com/users/mitar/following{/other_user}","gists_url":"https://api.github.com/users/mitar/gists{/gist_id}","starred_url":"https://api.github.com/users/mitar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mitar/subscriptions","organizations_url":"https://api.github.com/users/mitar/orgs","repos_url":"https://api.github.com/users/mitar/repos","events_url":"https://api.github.com/users/mitar/events{/privacy}","received_events_url":"https://api.github.com/users/mitar/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":7,"created_at":"2016-08-13T01:04:08Z","updated_at":"2016-08-13T23:34:31Z","closed_at":"2016-08-13T23:33:27Z","body":"I implemented a Python algorithm using `numpy.linalg.solve` and wanted to optimize it with `scipy.sparse.linalg.spsolve`. To my surprise, results are numerically significantly different.\r\n\r\nI made a [reproduction](https://github.com/mitar/peer-voting/blob/250a70fc305efcc6a45a4a2addcf8d86069432d4/voting.py). I compute a solution to a linear equations system and then compute an average of the resulting vector. Results are 0.02872638 (solve) vs. 0.027811508380662039 (spsolve). This is pretty scary to me."},"comment":{"url":"https://api.github.com/repos/scipy/scipy/issues/comments/239647263","html_url":"https://github.com/scipy/scipy/issues/6488#issuecomment-239647263","issue_url":"https://api.github.com/repos/scipy/scipy/issues/6488","id":239647263,"user":{"login":"mitar","id":585279,"avatar_url":"https://avatars.githubusercontent.com/u/585279?v=3","gravatar_id":"","url":"https://api.github.com/users/mitar","html_url":"https://github.com/mitar","followers_url":"https://api.github.com/users/mitar/followers","following_url":"https://api.github.com/users/mitar/following{/other_user}","gists_url":"https://api.github.com/users/mitar/gists{/gist_id}","starred_url":"https://api.github.com/users/mitar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mitar/subscriptions","organizations_url":"https://api.github.com/users/mitar/orgs","repos_url":"https://api.github.com/users/mitar/repos","events_url":"https://api.github.com/users/mitar/events{/privacy}","received_events_url":"https://api.github.com/users/mitar/received_events","type":"User","site_admin":false},"created_at":"2016-08-13T23:34:31Z","updated_at":"2016-08-13T23:34:31Z","body":"Hm hm. Thanks. Will look more into it."}}
{"actor":{"display_login":"mitar"}}