**Online Books by**

- Trench, William F., 1931-: Elementary Differential Equations (free online edition, 2013) (PDF and LaTeX at trinity.edu)
- Trench, William F., 1931-: Elementary Differential Equations With Boundary Value Problems (free online edition, 2013) (PDF and LaTeX at trinity.edu)
- Trench, William F., 1931-: Introduction to Real Analysis (updated electronic edition, with supplements "Functions Defined by Improper Integrals" and "The Method of Lagrange Multipliers"; c2012) (PDF and LaTeX files at trinity.edu)
- Trench, William F., 1931-: Student Solutions Manual for Elementary Differential Equations and Elementary Differential Equations With Boundary Value Problems (free online edition, originally published 2000) (PDF at trinity.edu)

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Additional books from the extended shelves:

- Trench, William F., 1931-: Elementary differential equations with boundary value problems (Brooks/Cole-Thomson Learning, 2001) (page images at HathiTrust)

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*Edited by John Mark Ockerbloom (onlinebooks@pobox.upenn.edu)OBP copyrights and licenses.*