# Copyright and permissions / 版权与许可

© 2026 Haobai Wang, for material in which the author lawfully owns copyright. All rights reserved in that material, except for the permissions stated below, statutory exceptions and separately licensed third-party material.

The website is free to read. Teachers are welcome to share links to the official webpages with students. The provided offline packages may be used for personal reading while retaining attribution and rights notices. These reading facilities do not grant a general right to republish, adapt, redistribute, or commercially reissue protected author-owned content.

Book text, original software, project-created figures and third-party materials are managed separately in publication/materials.json and on the Copyright & Attribution page. No general open-source licence has been selected for project-owned code; no CC BY-SA licence is adopted for the book. Existing third-party licences, statutory exceptions, and GitHub's applicable platform terms are not displaced.

AI-assisted material is assessed according to applicable law and the actual human contribution. No blanket copyright claim is made over automatically generated material. This notice does not claim exclusive rights in mathematical facts, ideas, public-domain material or content owned by others.

网站免费阅读，欢迎教师向学生分享正式网页链接。保留署名与权利说明，可使用本站提供的离线包进行个人阅读。这不构成对受保护且归作者所有内容的一般转载、改编、再分发或商业再出版授权。

对 Haobai Wang 依法拥有版权的部分，除上述阅读便利、法定例外及另行授权外，默认保留权利。不采用 CC BY-SA 4.0，也不擅自为程序代码选择通用开放许可。图片、第三方代码、引文及其他材料保留原权利人的权利与已有许可。

不将 AI 自动生成内容一概声明为受版权保护；不对数学事实、思想、公有领域材料或他人内容主张排他权利。详细范围及 AI 辅助情况以网站 Copyright & Attribution 页面和材料清单为准。