{"action":"created","issue":{"url":"https://api.github.com/repos/sympy/sympy/issues/11379","repository_url":"https://api.github.com/repos/sympy/sympy","labels_url":"https://api.github.com/repos/sympy/sympy/issues/11379/labels{/name}","comments_url":"https://api.github.com/repos/sympy/sympy/issues/11379/comments","events_url":"https://api.github.com/repos/sympy/sympy/issues/11379/events","html_url":"https://github.com/sympy/sympy/issues/11379","id":164861680,"number":11379,"title":"list(Intersection) gives unexpected result","user":{"login":"asmeurer","id":71486,"avatar_url":"https://avatars.githubusercontent.com/u/71486?v=3","gravatar_id":"","url":"https://api.github.com/users/asmeurer","html_url":"https://github.com/asmeurer","followers_url":"https://api.github.com/users/asmeurer/followers","following_url":"https://api.github.com/users/asmeurer/following{/other_user}","gists_url":"https://api.github.com/users/asmeurer/gists{/gist_id}","starred_url":"https://api.github.com/users/asmeurer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/asmeurer/subscriptions","organizations_url":"https://api.github.com/users/asmeurer/orgs","repos_url":"https://api.github.com/users/asmeurer/repos","events_url":"https://api.github.com/users/asmeurer/events{/privacy}","received_events_url":"https://api.github.com/users/asmeurer/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/sympy/sympy/labels/sets","name":"sets","color":"0000FF"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2016-07-11T15:12:41Z","updated_at":"2016-07-11T16:30:19Z","closed_at":null,"body":"```\r\nIn [41]: solveset(S(4)/3*radius**3 - volume, radius, domain=S.Reals)\r\nOut[41]:\r\n          ⎧                 ⎛⎧    2/3      3⋅volume    ⎞⎫\r\n          ⎪3 ___ 3 ________ ⎜⎪(-1)     for ──────── < 0⎟⎪\r\n(-∞, ∞) ∩ ⎨╲╱ 6 ⋅╲╱ volume ⋅⎜⎨                4        ⎟⎬\r\n          ⎪                 ⎜⎪                         ⎟⎪\r\n          ⎩                 ⎝⎩   1        otherwise    ⎠⎭\r\n\r\nIn [42]: list(solveset(S(4)/3*radius**3 - volume, radius, domain=S.Reals))\r\nOut[42]:\r\n⎡                 ⎛⎧    2/3      3⋅volume    ⎞                         ⎛⎧    2/3      3⋅volume    ⎞    ⎤\r\n⎢3 ___ 3 ________ ⎜⎪(-1)     for ──────── < 0⎟        3 ___ 3 ________ ⎜⎪(-1)     for ──────── < 0⎟    ⎥\r\n⎢╲╱ 6 ⋅╲╱ volume ⋅⎜⎨                4        ⎟ > -∞ ∧ ╲╱ 6 ⋅╲╱ volume ⋅⎜⎨                4        ⎟ < ∞⎥\r\n⎢                 ⎜⎪                         ⎟                         ⎜⎪                         ⎟    ⎥\r\n⎣                 ⎝⎩   1        otherwise    ⎠                         ⎝⎩   1        otherwise    ⎠    ⎦\r\n```\r\n\r\n`volume` should be set with `real=True`.\r\n\r\nThe list entry appears to be a boolean, but it should be an Expr. Perhaps it should just give the answer in the finite set. Or else use a Piecewise somehow. \r\n\r\n"},"comment":{"url":"https://api.github.com/repos/sympy/sympy/issues/comments/231788339","html_url":"https://github.com/sympy/sympy/issues/11379#issuecomment-231788339","issue_url":"https://api.github.com/repos/sympy/sympy/issues/11379","id":231788339,"user":{"login":"asmeurer","id":71486,"avatar_url":"https://avatars.githubusercontent.com/u/71486?v=3","gravatar_id":"","url":"https://api.github.com/users/asmeurer","html_url":"https://github.com/asmeurer","followers_url":"https://api.github.com/users/asmeurer/followers","following_url":"https://api.github.com/users/asmeurer/following{/other_user}","gists_url":"https://api.github.com/users/asmeurer/gists{/gist_id}","starred_url":"https://api.github.com/users/asmeurer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/asmeurer/subscriptions","organizations_url":"https://api.github.com/users/asmeurer/orgs","repos_url":"https://api.github.com/users/asmeurer/repos","events_url":"https://api.github.com/users/asmeurer/events{/privacy}","received_events_url":"https://api.github.com/users/asmeurer/received_events","type":"User","site_admin":false},"created_at":"2016-07-11T16:30:19Z","updated_at":"2016-07-11T16:30:19Z","body":"First we need to figure out what it should return. "}}
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