Proximal Algorithms
Neal Parikh & Stephen P. Boyd & Now Publishers
Collection of Problems in Probability Theory
L. D. Meshalkin
Numerical Optimization
Jorge Nocedal & Stephen J. Wright
Springer Series in Operations Research (1)
Proof and the Art of Mathematics: Examples and Extensions
Joel David Hamkins
Matrix Calculus (for Machine Learning and Beyond)
Alan Edelman, Steven G. Johnson