代数学
四元数代数：
https://link.springer.com/book/10.1007/978-3-030-56694-4
分析学
https://math-books.github.io/theory/(Math%20Book)%20Mathematical%20Analysis%2C%202nd%20Edition%20(Tom%20M.%20Apostol)%20(1974).pdf
https://invent.ilmkidunya.com/images/Section/mathematical-analysis-css-book.pdf
https://github.com/Kobe972/matrix-analysis
https://github.com/wuzhiyi/wzy-warehouse/tree/master
华章数学丛书
https://github.com/apachecn/huazhang-math-book/tree/master
https://gitee.com/OpenDocCN/huazhang-math-book
美国研究生数学
https://github.com/luxiaodong/Book/tree/master
优化理论
书名：Lectures on Convex Optimization
作者：Yurii Nesterov
下载链接：https://math.pku.edu.cn/amel/docs/20240417092720821855.pdf
书名：Numerical Optimization
作者：Jorge Nocedal，Stephen J. Wright
下载链接：https://www.math.kent.edu/~reichel/courses/optimization/Numerical_Optimization.pdf
https://github.com/ShiqinHuo/Numerical-Optimization-Books
https://web.stanford.edu/~boyd/cvxbook/bv_cvxbook.pdf
https://github.com/TianLin0509/Communication_eBooks/tree/main
https://github.com/ShiqinHuo/Numerical-Optimization-Books/tree/master
中小学教材
https://github.com/TapXWorld/ChinaTextbook/tree/master
其他
https://github.com/Sparky-Xia/THU-Mathematics-Books
https://github.com/jingyuexing/Ebook/tree/master
https://github.com/Rafiquzzaman420/Math-Books
https://github.com/CHH3213/Books
https://github.com/gongbingg/slam
https://github.com/LunaQu4kez/SUSTech_Math_Course_Materials
https://github.com/ShahzaibWaseem/FreeSpringerBooks/tree/master
https://github.com/Abhijit2505/springer-free-books
罗素《数学原理》
https://www.finophd.eu/wp-content/uploads/2018/11/Russell-Principles-of-Mathematics.pdf
