On the wooden table before him lay the object of his obsession: a physical copy of Integral Transforms by Goyal and Gupta. It was the third edition, the one with the errata sheet paper-clipped to the inside cover, notorious among the faculty of the Delhi School of Mathematics for containing a critical error in the chapter on Hankel Transforms.

The book "Integral Transforms" by B. L. Goyal and A. K. Gupta is a comprehensive textbook on integral transforms, written for undergraduate and graduate students in mathematics, physics, and engineering. The book covers the fundamental concepts of integral transforms, including:

| Chapter | Core Topics | Key Takeaways | |---------|-------------|---------------| | | Definitions, linearity, existence conditions | Sets the mathematical foundation; emphasizes the “transform‑solve‑inverse” workflow | | 2 – Fourier Transform | Continuous and discrete forms, properties, Parseval’s theorem | Essential for signal analysis and spectral methods | | 3 – Laplace Transform | One‑sided vs. two‑sided, region of convergence, inverse Laplace via residues | Cornerstone for solving linear ODEs & control‑system analysis | | 4 – Z‑Transform | Bilateral and unilateral forms, stability criteria, difference equations | Directly applicable to digital signal processing (DSP) | | 5 – Mellin & Hankel Transforms | Scaling properties, applications in optics and cylindrical problems | Less common but powerful for specific geometry problems | | 6 – Convolution Theorem & Applications | Convolution in time/frequency domains, system response | Bridges theory with engineering practice | | 7 – Integral Equations | Fredholm & Volterra types, solution via transforms | Extends transform techniques beyond ODEs | | Appendices | Tables of common transforms, solution keys, MATLAB/Python snippets | Quick reference for calculations and coding |

, providing over 100 pages of guided solutions for these topics. Comprehensive Transform Variety

This textbook is designed for Honours and postgraduate students, focusing on the following key areas: The Laplace Transform: