A Course in Mathematical Physics

Focusing on the principles of statistical mechanics, this final volume challenges traditional approaches by discarding outdated methodologies. The author critiques the limitations of conventional perturbation theory, emphasizing its lack of substantive results and convergence issues. Instead, the book advocates for establishing sharp bounds on quantities of interest, acknowledging the inherent complexities of nontrivial problems. This unique perspective sets it apart from typical texts in the field, aiming for a clearer understanding of the subject's fundamental concepts.