The Design of Approximation Algorithms
David P. Williamson & David B. Shmoys
Collection of Problems in Probability Theory
L. D. Meshalkin
Information Geometry and Its Applications
Shun-Ichi Amari
How to Prove It: A Structured Approach
Daniel J. Velleman
Proofs and Refutations: The Logic of Mathematical Discovery
Imre Lakatos
Proof and the Art of Mathematics: Examples and Extensions
Joel David Hamkins
Reading, Writing, and Proving: A Closer Look at Mathematics
Ulrich Daepp & Pamela Gorkin
Mathematical Thinking: Problem-Solving and Proofs 2nd Edition
John P. D'Angelo & Douglas Brent West
Proofs: A Long-Form Mathematics Textbook
Jay Cummings