Class page for MATH 20D Differential Equaitons, Fall 2013 - Hui Sun Jan 27 HW2: book questions: 1.4.7(turn in), 1.5.9(a)(turn in), and make sure you understand how to derive (1.5.20), (1.5.22) for Laplacian in cylindrical and spherical coordinates respectively (Don't turn in).

Reading Chapter 2, Sections 2-5. Solution to *homework* 2, very nicely written by your TA David Zhang. Section 7.1 1, 5, 7, 11, 12, 13

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**Homework** Heat and Mass Transfer in Biological Engineering Farlow Partial Differential Equations for Scientists and Engineers, a clearly written (and inexpensive) book that is somewhat more "physical" than the text by Strauss, and somewhat less theoretical. **Haberman** Elementary Applied Partial Differential Equations, which covers far more examples than Strauss, although with somewhat less theoretical insht.

*Homework* 1 Solution; 2 *Homework* 2 Solution; 3 *Homework* 3 Solution; 4 *Homework* 4 Solution; 5 *Homework* 5; 6 *Homework* 6 Solution. 10 *Homework* 10 Solution; 11 *Homework* 11 Solution; 12 *Homework* 12 Solution.

Math 54 Do not solve.) 4.9.14, 4.9.24, 4.9.32, 4.9.34 5.9.20, 5.9.30, 5.9.37, Computer Exercise, COMSOL Model Computation 6.11.12, 6.11.13, 6.11.16, 6.11.20 7.9.3, 7.9.16, 7.9.18 8.11.2, 8.11.6, 8.11.9, 8.11.23 9.8.21, 9.8.23, 9.8.27 10.8.10, 10.8.12 11.8.4, 11.8.7, 11.8.8, 12.6.21, (Provide Schematic, GE, BC, IC for these three problems.

Differential Equations Friday, 12/09, 2-5 pm in 310 Hearst Mining. Office Hours for the. *Homework* 8 Hints Solutions courtesy Boaz *Haberman*. *Homework* 9.

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HW Assnment - Joseph M. Mahaffy Solve Exercises: 5.1.2, 5.1.4, 5.3.2, 5.3.3, 5.3.4, 5.4.1, 6.4.1, 6.4.2, 6.5.2, 6.5.4 in Mattuck's book. Solve Exercises: 3.1.1 (nore parts (a) and (e)), 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.3.1 (nore parts (b) and (f)), 3.3.3, 3.4.2, 3.4.3 and 3.4.4 in Mattuck's book. Solve questions: 1.1.1, 1.2.1, 1.2.2, 1.2.3, 1.3.2, 1.5.2, and problem 1-1 in Mattuck's book.

There is a Take Home Final, which will be due Thursday, May 12. There are solutions to. HW Assnment #10 8.2.1b, 8.2.2b, 8.2.5, 8.3.1a, 8.4.2, 8.4.3.

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