{"action":"created","issue":{"url":"https://api.github.com/repos/clojure-numerics/expresso/issues/20","repository_url":"https://api.github.com/repos/clojure-numerics/expresso","labels_url":"https://api.github.com/repos/clojure-numerics/expresso/issues/20/labels{/name}","comments_url":"https://api.github.com/repos/clojure-numerics/expresso/issues/20/comments","events_url":"https://api.github.com/repos/clojure-numerics/expresso/issues/20/events","html_url":"https://github.com/clojure-numerics/expresso/issues/20","id":140828792,"number":20,"title":"How to differentiate between \"no solution\" and \"not solved\"?","user":{"login":"Vaguery","id":81171,"avatar_url":"https://avatars.githubusercontent.com/u/81171?v=3","gravatar_id":"","url":"https://api.github.com/users/Vaguery","html_url":"https://github.com/Vaguery","followers_url":"https://api.github.com/users/Vaguery/followers","following_url":"https://api.github.com/users/Vaguery/following{/other_user}","gists_url":"https://api.github.com/users/Vaguery/gists{/gist_id}","starred_url":"https://api.github.com/users/Vaguery/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Vaguery/subscriptions","organizations_url":"https://api.github.com/users/Vaguery/orgs","repos_url":"https://api.github.com/users/Vaguery/repos","events_url":"https://api.github.com/users/Vaguery/events{/privacy}","received_events_url":"https://api.github.com/users/Vaguery/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":8,"created_at":"2016-03-14T23:45:22Z","updated_at":"2016-09-14T03:19:14Z","closed_at":null,"body":"I've been trying to get expresso to handle [some simple 2-d geometric intersection problems](https://github.com/Vaguery/expresso-2dgeometry/blob/master/src/expresso_2d/core.clj), and while I _believe_ I have entered the equations correctly, the results are consistently `#{{}}`, which I assume is \"no result found\".\r\n\r\nIf you have a look at the last two tests, which are the intersection of a line and a circle, and the intersections of two circles (respectively), there should be nice, simple, integer results in both cases.\r\n\r\nI'd be happy to hear about additional simplification rules I can add. But the reason for the Issue is that the empty result `#{{}}` seems to be returned in many cases: \r\n\r\n- when no solution is found, but may exist\r\n- when an empty solution is found (definitively)\r\n- sometimes when the system is underdetermined (as in the case of identical circles, but _not_ identical lines)"},"comment":{"url":"https://api.github.com/repos/clojure-numerics/expresso/issues/comments/246894762","html_url":"https://github.com/clojure-numerics/expresso/issues/20#issuecomment-246894762","issue_url":"https://api.github.com/repos/clojure-numerics/expresso/issues/20","id":246894762,"user":{"login":"Vaguery","id":81171,"avatar_url":"https://avatars.githubusercontent.com/u/81171?v=3","gravatar_id":"","url":"https://api.github.com/users/Vaguery","html_url":"https://github.com/Vaguery","followers_url":"https://api.github.com/users/Vaguery/followers","following_url":"https://api.github.com/users/Vaguery/following{/other_user}","gists_url":"https://api.github.com/users/Vaguery/gists{/gist_id}","starred_url":"https://api.github.com/users/Vaguery/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Vaguery/subscriptions","organizations_url":"https://api.github.com/users/Vaguery/orgs","repos_url":"https://api.github.com/users/Vaguery/repos","events_url":"https://api.github.com/users/Vaguery/events{/privacy}","received_events_url":"https://api.github.com/users/Vaguery/received_events","type":"User","site_admin":false},"created_at":"2016-09-14T03:19:14Z","updated_at":"2016-09-14T03:19:14Z","body":"@JMacLulich Sorry, never did. TBH I was still very early in my exploratory phase with Clojure when I found this, and I'm not even sure what project I was working on when it cropped up."}}
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