{"action":"opened","issue":{"url":"https://api.github.com/repos/twosigma/beaker-notebook/issues/3754","repository_url":"https://api.github.com/repos/twosigma/beaker-notebook","labels_url":"https://api.github.com/repos/twosigma/beaker-notebook/issues/3754/labels{/name}","comments_url":"https://api.github.com/repos/twosigma/beaker-notebook/issues/3754/comments","events_url":"https://api.github.com/repos/twosigma/beaker-notebook/issues/3754/events","html_url":"https://github.com/twosigma/beaker-notebook/issues/3754","id":142663466,"number":3754,"title":"Issues rendering matrices","user":{"login":"Chris1221","id":8516981,"avatar_url":"https://avatars.githubusercontent.com/u/8516981?v=3","gravatar_id":"","url":"https://api.github.com/users/Chris1221","html_url":"https://github.com/Chris1221","followers_url":"https://api.github.com/users/Chris1221/followers","following_url":"https://api.github.com/users/Chris1221/following{/other_user}","gists_url":"https://api.github.com/users/Chris1221/gists{/gist_id}","starred_url":"https://api.github.com/users/Chris1221/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Chris1221/subscriptions","organizations_url":"https://api.github.com/users/Chris1221/orgs","repos_url":"https://api.github.com/users/Chris1221/repos","events_url":"https://api.github.com/users/Chris1221/events{/privacy}","received_events_url":"https://api.github.com/users/Chris1221/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-03-22T14:16:22Z","updated_at":"2016-03-22T14:16:22Z","closed_at":null,"body":"The following code\r\n\r\n```tex\r\n$$ \\vec{J} = \\begin{bmatrix} \\frac{\\partial f}{\\partial{V}} & \\frac{\\partial f}{\\partial{W}} \\\\ \\frac{\\partial g}{\\partial{V}} & \\frac{\\partial g}{\\partial{W}} \\end{bmatrix} $$\r\n```\r\n\r\nreturns\r\n\r\n```\r\nKaTeX parse error: Expected 'EOF', got '\\begin' at position 16: vec{J} = \\begin̲{bmatrix} \\fra...\r\nSee: KaTeX website and its list of supported functions.\r\n```\r\n\r\non the latest release of Beaker on OSX 10.10.4. The code renders fine on the KaTeX website:\r\n\r\n![image](https://cloud.githubusercontent.com/assets/8516981/13954391/f25147b8-f016-11e5-81b9-8780e0943e94.png)\r\n\r\nThe same error is returned whether the expression is contained within `$$` in \"text mode\" or without in a dedicated `TeX` code block.\r\n\r\nI'm wondering if I've confused the syntax or whether there is an issue in rendering matrices. \r\n\r\n\r\n"}}