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Chapters I through IV cover the one-dimensional wave equation

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An Introduction to Differential Equations and Their Applications oz universeIntended for use in a beginning one semester course in differential equations, this text is designed for students of pure and applied mathematics with a working knowledge of algebra, trigonometry, and elementary calculus. Its mathematical rigor is balanced by complete but simple explanations that appeal to readers' physical and geometric intuition. Starting with an introduction to differential equations, the text proceeds to examinations of first and