http://web.mit.edu/15.053/www/AMP-Chapter-09.pdf
https://www.cs.cmu.edu/~anupamg/adv-approx/lecture14.pdf
http://bangla.salearningschool.com/recent-posts/misc-optimization/
https://www.futurelearn.com/info/courses/maths-linear-quadratic-relations/0/steps/12128
https://www.mathsisfun.com/algebra/systems-linear-equations-matrices.html
https://www.wolframalpha.com/input/?i=subspace
https://www.cse.iitk.ac.in/users/rmittal/prev_course/s14/notes/lec3.pdf
https://observablehq.com/@eliaskal/point-combinations-linear-conic-affine-convex
https://www.cse.iitk.ac.in/users/rmittal/prev_course/s14/course_s14.html
http://bangla.salearningschool.com/recent-posts/misc-math-might-relate-to-optimization/
https://www.dr-eriksen.no/teaching/GRA6035/2010/lecture4.pdf
https://www.mathsisfun.com/calculus/concave-up-down-convex.html
https://www-ljk.imag.fr/membres/Anatoli.Iouditski/cours/convex/chapitre_3.pdf
https://www.thestudentroom.co.uk/showthread.php?t=1247928
https://en.wikipedia.org/wiki/Hessian_matrix
https://en.wikipedia.org/wiki/Newton%27s_method_in_optimization
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781118733639.app6
https://en.wikipedia.org/wiki/Interior-point_method
https://web.stanford.edu/~boyd/papers/rt_cvx_sig_proc.html
Must Read
good one
http://www.bcamath.org/documentos_public/courses/Nogales_2012-13_02_18-22.pdf
https://en.wikipedia.org/wiki/Convex_analysis
https://www.khanacademy.org/search?page_search_query=Optimization%20problems%20(calculus)
http://bangla.salearningschool.com/recent-posts/overview-on-optimization-concepts-from-the-internet/
http://bangla.salearningschool.com/recent-posts/misc-optimization-machine-learning/
https://www.mathsisfun.com/algebra/matrix-inverse-row-operations-gauss-jordan.html