Unlock the world of differential equations with Ordinary and Partial Differential Equations, 20th Edition by Dr. M.D. Raisinghania. This comprehensive guide, trusted by students and professionals alike, offers in-depth coverage, systematic solution techniques, and clear, step-by-step proofs. Ideal for undergraduate and postgraduate Mathematics and Physics students, engineering aspirants, and GATE/CSIR-UGC NET candidates. Explore fundamental concepts, advanced theories like Picard’s Theorem, and practical applications with numerous solved examples and exercises. This edition features a new chapter on Miscellaneous Methods and Existence & Uniqueness Theorem, ensuring you’re equipped with the latest knowledge for academic success and competitive exams. A must-have resource for mastering differential equations.