Hi , I am in need of some reference material to study below Math topics : Linear Algebra - Vectors and Linear Spaces Linear Algebra - Matrix Theory Multivariate Calculus Probability Fundamentals Numerical Methods for Optimization I dont know how in depth knowledge of the above concepts is needed . However I need to study the above in prep for a machine learning course . So in that perspective , please let me know where to find the relevant Math study material . Its been a while since I studied the first four topics above so really appreciate something basic and gradually move ahead. I guess it should be high school math or above here in the U.S , not sure though. Thank you .