{"action":"created","issue":{"url":"https://api.github.com/repos/mathjax/MathJax/issues/1033","labels_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/labels{/name}","comments_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/comments","events_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/events","html_url":"https://github.com/mathjax/MathJax/issues/1033","id":56119308,"number":1033,"title":"Math Processing Error","user":{"login":"PeterLuschny","id":876830,"avatar_url":"https://avatars.githubusercontent.com/u/876830?v=3","gravatar_id":"","url":"https://api.github.com/users/PeterLuschny","html_url":"https://github.com/PeterLuschny","followers_url":"https://api.github.com/users/PeterLuschny/followers","following_url":"https://api.github.com/users/PeterLuschny/following{/other_user}","gists_url":"https://api.github.com/users/PeterLuschny/gists{/gist_id}","starred_url":"https://api.github.com/users/PeterLuschny/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/PeterLuschny/subscriptions","organizations_url":"https://api.github.com/users/PeterLuschny/orgs","repos_url":"https://api.github.com/users/PeterLuschny/repos","events_url":"https://api.github.com/users/PeterLuschny/events{/privacy}","received_events_url":"https://api.github.com/users/PeterLuschny/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mathjax/MathJax/labels/Accepted","name":"Accepted","color":"48ab4e"},{"url":"https://api.github.com/repos/mathjax/MathJax/labels/In%20Development","name":"In Development","color":"e8c32e"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2015-01-31T09:30:43Z","updated_at":"2015-01-31T16:09:17Z","closed_at":null,"body":"Hi!\r\n\r\n    \\begin{equation}\r\n    \\sum_{k=0}^n (-1)^k \\genfrac < > {0pt}{}{n}{k} = \\frac{4^{n+1}-2^{n+1}}{n+1} B_{n+1},\r\n    \\end{equation}\r\n\r\nworked until yesterday, today we have\r\n\r\n    <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"block\">\r\n      <merror>\r\n        <mtext>\\begin{equation}\r\n    \\sum_{k=0}^n&#xA0;(-1)^k&#xA0;\\genfrac&#xA0;&lt;&#xA0;&gt;&#xA0;{0pt}{}{n}     {k}&#xA0;=&#xA0;\\frac{4^{n+1}-2^{n+1}}{n+1}&#xA0;B_{n+1},\r\n    \\end{equation}</mtext>\r\n      </merror>\r\n    </math>\r\n\r\nRegards\r\nPeter Luschny\r\n"},"comment":{"url":"https://api.github.com/repos/mathjax/MathJax/issues/comments/72323674","html_url":"https://github.com/mathjax/MathJax/issues/1033#issuecomment-72323674","issue_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033","id":72323674,"user":{"login":"dpvc","id":432782,"avatar_url":"https://avatars.githubusercontent.com/u/432782?v=3","gravatar_id":"","url":"https://api.github.com/users/dpvc","html_url":"https://github.com/dpvc","followers_url":"https://api.github.com/users/dpvc/followers","following_url":"https://api.github.com/users/dpvc/following{/other_user}","gists_url":"https://api.github.com/users/dpvc/gists{/gist_id}","starred_url":"https://api.github.com/users/dpvc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dpvc/subscriptions","organizations_url":"https://api.github.com/users/dpvc/orgs","repos_url":"https://api.github.com/users/dpvc/repos","events_url":"https://api.github.com/users/dpvc/events{/privacy}","received_events_url":"https://api.github.com/users/dpvc/received_events","type":"User","site_admin":false},"created_at":"2015-01-31T16:09:17Z","updated_at":"2015-01-31T16:09:17Z","body":"@CharlesAnifowose, there are a number of ways to get information about errors from MathJax.  For example, if you want to find out about TeX parsing errors, you can use\r\n\r\n      MathJax.Hub.Register.MessageHook(\"TeX Jax - parse error\",function (message) {\r\n        // do something with the error.  message[1] will contain the data about the error.\r\n      });\r\n\r\nIf you want to find out about \"Math Processing Error\" messages, use\r\n\r\n      MathJax.Hub.Register.MessageHook(\"Math Processing Error\",function (message) {\r\n        //  do something with the error.  message[2] is the Error object that records the problem.\r\n      });\r\n\r\nThere are similar messages for other input formats, and some messages about output like use of characters outside the fonts in use.  If you are interested in collecting such data, we have a [performance analysis tool](https://github.com/mathjax/MathJax-profiler) that can be used to collect lots of data about how MathJax is running.  If you want to discuss this further, the [MathJax-dev forum](https://groups.google.com/forum/?fromgroups#!forum/mathjax-dev) is probably the place for it."}}