{"action":"created","issue":{"url":"https://api.github.com/repos/Krasjet/quaternion/issues/14","repository_url":"https://api.github.com/repos/Krasjet/quaternion","labels_url":"https://api.github.com/repos/Krasjet/quaternion/issues/14/labels{/name}","comments_url":"https://api.github.com/repos/Krasjet/quaternion/issues/14/comments","events_url":"https://api.github.com/repos/Krasjet/quaternion/issues/14/events","html_url":"https://github.com/Krasjet/quaternion/issues/14","id":481867362,"node_id":"MDU6SXNzdWU0ODE4NjczNjI=","number":14,"title":"您好，我有一疑问，5.4节中双倍覆盖带来的问题，q1和-q1是同一个向量而图示中-q1和q1却是相反的向量，这样是不是有问题？应该描述为一个小于180度的角度和大于180度的角度是吗？","user":{"login":"mantangL","id":26612388,"node_id":"MDQ6VXNlcjI2NjEyMzg4","avatar_url":"https://avatars0.githubusercontent.com/u/26612388?v=4","gravatar_id":"","url":"https://api.github.com/users/mantangL","html_url":"https://github.com/mantangL","followers_url":"https://api.github.com/users/mantangL/followers","following_url":"https://api.github.com/users/mantangL/following{/other_user}","gists_url":"https://api.github.com/users/mantangL/gists{/gist_id}","starred_url":"https://api.github.com/users/mantangL/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mantangL/subscriptions","organizations_url":"https://api.github.com/users/mantangL/orgs","repos_url":"https://api.github.com/users/mantangL/repos","events_url":"https://api.github.com/users/mantangL/events{/privacy}","received_events_url":"https://api.github.com/users/mantangL/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2019-08-17T09:20:16Z","updated_at":"2019-08-17T15:28:34Z","closed_at":null,"author_association":"NONE","body":"另p45中最下面公式，q0和q1的夹角是否应为$2\\theta$呢？"},"comment":{"url":"https://api.github.com/repos/Krasjet/quaternion/issues/comments/522247142","html_url":"https://github.com/Krasjet/quaternion/issues/14#issuecomment-522247142","issue_url":"https://api.github.com/repos/Krasjet/quaternion/issues/14","id":522247142,"node_id":"MDEyOklzc3VlQ29tbWVudDUyMjI0NzE0Mg==","user":{"login":"Krasjet","id":5229241,"node_id":"MDQ6VXNlcjUyMjkyNDE=","avatar_url":"https://avatars2.githubusercontent.com/u/5229241?v=4","gravatar_id":"","url":"https://api.github.com/users/Krasjet","html_url":"https://github.com/Krasjet","followers_url":"https://api.github.com/users/Krasjet/followers","following_url":"https://api.github.com/users/Krasjet/following{/other_user}","gists_url":"https://api.github.com/users/Krasjet/gists{/gist_id}","starred_url":"https://api.github.com/users/Krasjet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Krasjet/subscriptions","organizations_url":"https://api.github.com/users/Krasjet/orgs","repos_url":"https://api.github.com/users/Krasjet/repos","events_url":"https://api.github.com/users/Krasjet/events{/privacy}","received_events_url":"https://api.github.com/users/Krasjet/received_events","type":"User","site_admin":false},"created_at":"2019-08-17T15:28:34Z","updated_at":"2019-08-17T15:28:34Z","author_association":"OWNER","body":"q1 和 -q1 是同一个（4D）向量 ✗\r\nq1 和 -q1 所作出的旋转变换是等价的 ✔\r\n\r\nq0 和 q1 （作为4D向量）的夹角是 2θ ✗\r\nq0 和 q1 对同一个向量 v 作出旋转变换之后所得的向量 v0 和 v1 之间的夹角是 2θ ✔"}}
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