Zill D.G., Cullen M.R. Differential Equations with Boundary-Value Problems

7th Edition — Brooks/Cole, Cengage Learning, 2009. — 613 p. — ISBN: 978-0495108368, 0495108367.Differential Equations with Boundary-Value Problems (7th Edition) strikes a balance between the analytical, qualitative, and quantitative approaches to the study of differential equations. This proven and accessible text speaks to beginning engineering and math students through a wealth of pedagogical aids, including an abundance of examples, explanations, "Remarks" boxes, definitions, and group projects. Using a straightforward, readable, and helpful style, this book provides a thorough treatment of boundary-value problems and partial differential equations.