https://fleuret.org/dlc/

https://fleuret.org/public/lbdl.pdf

https://mlu-explain.github.io/

this is apparently good: https://www.penguinrandomhouse.com/books/730887/understanding-deep-learning-by-simon-j-d-prince/

and this is also apparently good, plus good math intro: https://www.deeplearningbook.org/

and there's this for matrix theory also https://www.amazon.com/Matrix-Theory-Dover-Books-Mathematics-ebook/dp/B00ETILFJY/ref=mp_s_a_1_19?crid=3JUNVOR3GU1L6&dib=eyJ2IjoiMSJ9.Dz9HnlmPCSgeNm4dWXb1ZinOKcdux1W3BUqr5wNcNdqypiK3eUCHigud2h1G1Sn554SGD0fEaUPy8vwch35r0VQg-RoWT8JtkaNmmnYFjIKY8Mcv_QstKiCSl5mQFTGL3L4F2zQyfIdR-34pktqkOSydU8MhE5-IG6MjD_v2vVmzmI_Stakw2HxeQDwkAwZ5UjSVQJ28pbsH72mdxFWL4w.U64o1ByTGKd2dHZC8rL9_BzQlzRlzwEzjrrHVRHQjwU&dib_tag=se&keywords=matrix+theory&qid=1709396559&sprefix=matrix+theory%2Caps%2C145&sr=8-19