<p>From the reviews:</p><p>"This work by Agarwal (Florida Institute of Technology) and OâRegan ⌠gives a clear introduction to the fields of study identified in its title. ⌠The authors provide 50 short lectures on various topics in the theory of ordinary and partial differential equations. This format makes independent reading of the book easier since it condenses the material into sections of manageable length. ⌠Beginning graduate students would be the ideal audience for such self-study. Summing Up: Recommended. Academic audiences, upper-division undergraduates and above." (S. L. Sullivan, Choice, Vol. 47 (1), September, 2009)</p><p>âThe book comprises 50 class-tested lectures which both the authors have given to engineering and mathematics major students under the titles Boundary Value Problems and Methods of Mathematical Physics at various institutions all over the globe ⌠. The prerequisite for this book is calculus, so it can be used for a senior undergraduate course. It should also be suitable for a beginning graduate course ⌠. The answers and hints to almost all the exercises are provided for the convenience of the reader.â (Juri M<b>. </b>Rappoport, Zentralblatt MATH, Vol. 1172, 2009)</p>