A Course in Mathematical Physics 2

The book emphasizes the importance of modern differential geometry in theoretical physics, reflecting its growing relevance over the past decade. The author maintains the original mathematical language while correcting errors and adding a section on gauge theories, which are crucial for understanding fundamental interactions. Although developments in Kaluza-Klein theories and cosmology are noted, the author refrains from including them to avoid unproven speculations. Acknowledgments are given to contributors for their input and assistance in improving the work.