Edwards C. And D. Penney. Elementary Differential Equations With Boundary Value Problems. 6th Ed -

C. Henry Edwards and David E. Penney are both experienced mathematicians and educators. Edwards received his Ph.D. from the University of Minnesota and has taught at the University of Georgia, where he is currently a professor emeritus. Penney received his Ph.D. from the University of Minnesota and has taught at the University of Georgia, where he is currently a professor emeritus. Both authors have extensive experience in teaching and writing mathematics textbooks.