{"action":"created","issue":{"url":"https://api.github.com/repos/sympy/sympy/issues/11581","repository_url":"https://api.github.com/repos/sympy/sympy","labels_url":"https://api.github.com/repos/sympy/sympy/issues/11581/labels{/name}","comments_url":"https://api.github.com/repos/sympy/sympy/issues/11581/comments","events_url":"https://api.github.com/repos/sympy/sympy/issues/11581/events","html_url":"https://github.com/sympy/sympy/issues/11581","id":174968045,"number":11581,"title":"conjugate of real expression should not change expression","user":{"login":"mzaffalon","id":1351814,"avatar_url":"https://avatars.githubusercontent.com/u/1351814?v=3","gravatar_id":"","url":"https://api.github.com/users/mzaffalon","html_url":"https://github.com/mzaffalon","followers_url":"https://api.github.com/users/mzaffalon/followers","following_url":"https://api.github.com/users/mzaffalon/following{/other_user}","gists_url":"https://api.github.com/users/mzaffalon/gists{/gist_id}","starred_url":"https://api.github.com/users/mzaffalon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mzaffalon/subscriptions","organizations_url":"https://api.github.com/users/mzaffalon/orgs","repos_url":"https://api.github.com/users/mzaffalon/repos","events_url":"https://api.github.com/users/mzaffalon/events{/privacy}","received_events_url":"https://api.github.com/users/mzaffalon/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":9,"created_at":"2016-09-04T20:29:46Z","updated_at":"2016-09-23T14:50:03Z","closed_at":null,"body":"The square root of a real quantity does not seem to be detected as real. The last two expressions are not evaluated as 0.\r\n```\r\nx, y = symbols(\"x, y\", real=True)\r\nr = sqrt(x**2+y**2)\r\nsimplify(conjugate(r)-r)\r\nsimplify(conjugate(re(r))-r)\r\n```"},"comment":{"url":"https://api.github.com/repos/sympy/sympy/issues/comments/249213438","html_url":"https://github.com/sympy/sympy/issues/11581#issuecomment-249213438","issue_url":"https://api.github.com/repos/sympy/sympy/issues/11581","id":249213438,"user":{"login":"mzaffalon","id":1351814,"avatar_url":"https://avatars.githubusercontent.com/u/1351814?v=3","gravatar_id":"","url":"https://api.github.com/users/mzaffalon","html_url":"https://github.com/mzaffalon","followers_url":"https://api.github.com/users/mzaffalon/followers","following_url":"https://api.github.com/users/mzaffalon/following{/other_user}","gists_url":"https://api.github.com/users/mzaffalon/gists{/gist_id}","starred_url":"https://api.github.com/users/mzaffalon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mzaffalon/subscriptions","organizations_url":"https://api.github.com/users/mzaffalon/orgs","repos_url":"https://api.github.com/users/mzaffalon/repos","events_url":"https://api.github.com/users/mzaffalon/events{/privacy}","received_events_url":"https://api.github.com/users/mzaffalon/received_events","type":"User","site_admin":false},"created_at":"2016-09-23T14:50:03Z","updated_at":"2016-09-23T14:50:03Z","body":"Sorry for the delay, I seem to have an aversion to git that makes me procrastinate anything that has to do with it.\r\n\r\nYour proposed patch fails for\r\n\r\n1. `sympy\\concrete\\tests\\test_sums_products.py:test_euler_maclaurin` -> `AttributeError: 'NoneType' object has no attribute 'is_nonnegative'`\r\n2. ` sympy\\concrete\\tests\\test_sums_products.py:test_is_convergent` -> `AttributeError: 'bool' object has no attribute 'is_nonnegative'`\r\n3. `sympy\\core\\tests\\test_arit.py:test_pow` -> `AttributeError: 'NoneType' object has no attribute 'is_nonnegative'`\r\n\r\nI stopped here because the tests were taking too long."}}
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