{"action":"created","issue":{"url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/65","labels_url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/65/labels{/name}","comments_url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/65/comments","events_url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/65/events","html_url":"https://github.com/ApproxFun/ApproxFun.jl/issues/65","id":51616993,"number":65,"title":"\\ should choose a space if none is inferrable","user":{"login":"dlfivefifty","id":1229737,"avatar_url":"https://avatars.githubusercontent.com/u/1229737?v=3","gravatar_id":"","url":"https://api.github.com/users/dlfivefifty","html_url":"https://github.com/dlfivefifty","followers_url":"https://api.github.com/users/dlfivefifty/followers","following_url":"https://api.github.com/users/dlfivefifty/following{/other_user}","gists_url":"https://api.github.com/users/dlfivefifty/gists{/gist_id}","starred_url":"https://api.github.com/users/dlfivefifty/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dlfivefifty/subscriptions","organizations_url":"https://api.github.com/users/dlfivefifty/orgs","repos_url":"https://api.github.com/users/dlfivefifty/repos","events_url":"https://api.github.com/users/dlfivefifty/events{/privacy}","received_events_url":"https://api.github.com/users/dlfivefifty/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2014-12-10T22:01:12Z","updated_at":"2015-01-28T07:13:04Z","closed_at":"2015-01-28T07:13:04Z","body":"I wish I could type\r\n\r\nD=Derivative()\r\nB=dirichlet()\r\nx=Fun(identity)\r\nu=[B,D^2+x]\\[1.,0.]\r\n\r\nand it chooses the space from x.  At the moment, the x is interpreted as Multiplication(x,AnySpace()) so that spaces can be inferred from other operators.  (Since Chebyshev can multiply other spaces like Jacobi).  Some system for choosing a default space should exist when it returns AnySpace.\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/comments/71790876","html_url":"https://github.com/ApproxFun/ApproxFun.jl/issues/65#issuecomment-71790876","issue_url":"https://api.github.com/repos/ApproxFun/ApproxFun.jl/issues/65","id":71790876,"user":{"login":"dlfivefifty","id":1229737,"avatar_url":"https://avatars.githubusercontent.com/u/1229737?v=3","gravatar_id":"","url":"https://api.github.com/users/dlfivefifty","html_url":"https://github.com/dlfivefifty","followers_url":"https://api.github.com/users/dlfivefifty/followers","following_url":"https://api.github.com/users/dlfivefifty/following{/other_user}","gists_url":"https://api.github.com/users/dlfivefifty/gists{/gist_id}","starred_url":"https://api.github.com/users/dlfivefifty/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dlfivefifty/subscriptions","organizations_url":"https://api.github.com/users/dlfivefifty/orgs","repos_url":"https://api.github.com/users/dlfivefifty/repos","events_url":"https://api.github.com/users/dlfivefifty/events{/privacy}","received_events_url":"https://api.github.com/users/dlfivefifty/received_events","type":"User","site_admin":false},"created_at":"2015-01-28T07:13:04Z","updated_at":"2015-01-28T07:13:04Z","body":"That was easier than expected :) It defaults to\r\n\r\nchoosedomainspace(A::Operator,::)=domainspace(A)\r\n\r\nbut operators that support UnsetSpace can override it.  Right now only Multiplication does, but RealOperator is next\r\n\r\n"}}