{"action":"opened","issue":{"url":"https://api.github.com/repos/mml-book/mml-book.github.io/issues/226","repository_url":"https://api.github.com/repos/mml-book/mml-book.github.io","labels_url":"https://api.github.com/repos/mml-book/mml-book.github.io/issues/226/labels{/name}","comments_url":"https://api.github.com/repos/mml-book/mml-book.github.io/issues/226/comments","events_url":"https://api.github.com/repos/mml-book/mml-book.github.io/issues/226/events","html_url":"https://github.com/mml-book/mml-book.github.io/issues/226","id":395648768,"node_id":"MDU6SXNzdWUzOTU2NDg3Njg=","number":226,"title":"Chapter 07, Example 7.1, Equation 7.8 error in gradient","user":{"login":"antoinetlc","id":2575479,"node_id":"MDQ6VXNlcjI1NzU0Nzk=","avatar_url":"https://avatars1.githubusercontent.com/u/2575479?v=4","gravatar_id":"","url":"https://api.github.com/users/antoinetlc","html_url":"https://github.com/antoinetlc","followers_url":"https://api.github.com/users/antoinetlc/followers","following_url":"https://api.github.com/users/antoinetlc/following{/other_user}","gists_url":"https://api.github.com/users/antoinetlc/gists{/gist_id}","starred_url":"https://api.github.com/users/antoinetlc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/antoinetlc/subscriptions","organizations_url":"https://api.github.com/users/antoinetlc/orgs","repos_url":"https://api.github.com/users/antoinetlc/repos","events_url":"https://api.github.com/users/antoinetlc/events{/privacy}","received_events_url":"https://api.github.com/users/antoinetlc/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2019-01-03T16:55:35Z","updated_at":"2019-01-03T16:55:35Z","closed_at":null,"author_association":"NONE","body":"**Describe the mistake**\r\nIn Example 7.1, equation 7.8 of Chapter 7, there is a missing factor 2 in the gradient of the function f.\r\n\r\n**Location**\r\nPlease provide the \r\n1. version (bottom of page) : Draft chapter (November, 12, 2018)\r\n2. Chapter 7\r\n3. page 227\r\n4. line number/equation number : Equation 7.8\r\n\r\n**Proposed solution**\r\nIn equation 7.8 the gradient of f should be equal to **2***[[2, 1], [1, 20]]*[x_1, x_2] - [5, 3] (the factor 2 in bold is currently missing).\r\n\r\n"}}
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