Differential Equations And Their Applications By Zafar Ahsan Link -

The book is currently in its 3rd edition (published by PHI Learning in 2016).

based on that book

Zafar Ahsan is a prominent mathematician with extensive experience in teaching and research. He has written several books on mathematics, including "Differential Equations and Their Applications," which has become a standard textbook for undergraduate and graduate students. Ahsan's writing style is clear, concise, and easy to follow, making complex mathematical concepts accessible to a broad audience. The book is currently in its 3rd edition