On this webpage you will find my solutions to the second edition of "Partial Differential Equations: An Introduction" by Walter A. Strauss. Here is a link to the book's page on amazon.com. If you find my work useful, please consider making a donation. Thank you.

Section 1.1 Section 1.2 Section 1.3 Section 1.4 Section 1.5 Section 1.6
Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1
Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2
Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3
Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4
Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5
Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 6
Exercise 7 Exercise 7 Exercise 7 Exercise 7
Exercise 8 Exercise 8 Exercise 8
Exercise 9 Exercise 9 Exercise 9
Exercise 10 Exercise 10 Exercise 10
Exercise 11 Exercise 11 Exercise 11
Exercise 12 Exercise 12
Exercise 13
Section 2.1 Section 2.2 Section 2.3 Section 2.4 Section 2.5
Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 12 Exercise 1
Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 13 Exercise 2
Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 14 Exercise 3
Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 15 Exercise 4
Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 16
Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 17
Exercise 7 Exercise 7 Exercise 7 Exercise 18
Exercise 8 Exercise 8 Exercise 8 Exercise 19
Exercise 9 Exercise 9
Exercise 10 Exercise 10
Exercise 11 Exercise 11
Section 3.1 Section 3.2 Section 3.3 Section 3.4 Section 3.5
Exercise 1 Exercise 1 Exercise 9 Exercise 1 Exercise 1 Exercise 9 Exercise 1
Exercise 2 Exercise 2 Exercise 10 Exercise 2 Exercise 2 Exercise 10 Exercise 2
Exercise 3 Exercise 3 Exercise 11 Exercise 3 Exercise 3 Exercise 11
Exercise 4 Exercise 4 Exercise 4 Exercise 12
Exercise 5 Exercise 5 Exercise 5 Exercise 13
Exercise 6 Exercise 6 Exercise 14
Exercise 7 Exercise 7 Exercise 15
Exercise 8 Wave simulation Exercise 8
Section 4.1 Section 4.2 Section 4.3
Exercise 1 Exercise 1 Exercise 1 Exercise 8 Exercise 15
Exercise 2 Exercise 2 Exercise 2 Exercise 9 Exercise 16
Exercise 3 Exercise 3 Exercise 3 Exercise 10 Exercise 17
Exercise 4 Exercise 4 Exercise 4 Exercise 11 Exercise 18
Exercise 5 Exercise 5 Exercise 12 Exercise 19
Exercise 6 Exercise 6 Exercise 13
Exercise 7 Exercise 14
Section 5.1 Section 5.2 Section 5.3 Section 5.4 Section 5.5 Section 5.6
Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1
Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2
Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3
Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4
Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5
Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 6
Exercise 7 Exercise 7 Exercise 7 Exercise 7 Exercise 7 Exercise 7
Exercise 8 Exercise 8 Exercise 8 Exercise 8 Exercise 8 Exercise 8
Exercise 9 Exercise 9 Exercise 9 Exercise 9 Exercise 9 Exercise 9
Exercise 10 Exercise 10 Exercise 10 Exercise 10 Exercise 10 Exercise 10
Exercise 11 Exercise 11 Exercise 11 Exercise 11 Exercise 11 Exercise 11
Exercise 12 Exercise 12 Exercise 12 Exercise 12 Exercise 12
Exercise 13 Exercise 13 Exercise 13 Exercise 13 Exercise 13
Exercise 14 Exercise 14 Exercise 14 Exercise 14
Exercise 15 Exercise 15 Exercise 15 Exercise 15
Exercise 16 Exercise 16
Exercise 17 Exercise 17
Exercise 18
Exercise 19
Exercise 20
Section 6.1 Section 6.2 Section 6.3 Section 6.4
Exercise 1 Exercise 8 Exercise 1 Exercise 1 Exercise 1 Exercise 8
Exercise 2 Exercise 9 Exercise 2 Exercise 2 Exercise 2 Exercise 9
Exercise 3 Exercise 10 Exercise 3 Exercise 3 Exercise 3 Exercise 10
Exercise 4 Exercise 11 Exercise 4 Exercise 4 Exercise 4 Exercise 11
Exercise 5 Exercise 12 Exercise 5 Exercise 5 Exercise 12
Exercise 6 Exercise 6 Exercise 6 Exercise 13
Exercise 7 Exercise 7 Exercise 7 Exercise 14
Section 7.1 Section 7.2 Section 7.3 Section 7.4
Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 11 Exercise 21
Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 12 Exercise 22
Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 13 Exercise 23
Exercise 4 Exercise 4 Exercise 14 Exercise 24
Exercise 5 Exercise 5 Exercise 15 Exercise 25
Exercise 6 Exercise 6 Exercise 16
Exercise 7 Exercise 7 Exercise 17
Exercise 8 Exercise 8 Exercise 18
Exercise 9 Exercise 9 Exercise 19
Exercise 10 Exercise 10 Exercise 20
Section 8.1 Section 8.2 Section 8.3 Section 8.4 Section 8.5
Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution
Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution
Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution
Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution
Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution
Exercise 6 | Solution Exercise 6 | Solution Exercise 6 | Solution
Exercise 7 | Solution Exercise 7 | Solution Exercise 7 | Solution
Exercise 8 | Solution Exercise 8 | Solution Exercise 8 | Solution
Exercise 9 | Solution Exercise 9 | Solution Exercise 9 | Solution
Exercise 10 | Solution Exercise 10 | Solution Exercise 10 | Solution
Exercise 11 | Solution Exercise 11 | Solution Exercise 11 | Solution
Exercise 12 | Solution Exercise 12 | Solution
Exercise 13 | Solution
Exercise 14 | Solution
Exercise 15 | Solution
Section 9.1 Section 9.2 Section 9.3 Section 9.4 Section 9.5
Exercise 1 Exercise 1 Exercise 11 Exercise 1 Exercise 1 Exercise 1
Exercise 2 Exercise 2 Exercise 12 Exercise 2 Exercise 2 Exercise 2
Exercise 3 Exercise 3 Exercise 13 Exercise 3 Exercise 3
Exercise 4 Exercise 4 Exercise 14 Exercise 4 Exercise 4
Exercise 5 Exercise 5 Exercise 15 Exercise 5 Exercise 5
Exercise 6 Exercise 6 Exercise 16 Exercise 6 Exercise 6
Exercise 7 Exercise 7 Exercise 17 Exercise 7 Exercise 7
Exercise 8 Exercise 8 Exercise 18 Exercise 8
Exercise 9 Exercise 19 Exercise 9
Exercise 10 Exercise 20
Section 10.1 Section 10.2 Section 10.3 Section 10.4 Section 10.5 Section 10.6 Section 10.7
Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1 Exercise 1
Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2 Exercise 2
Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3 Exercise 3
Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4 Exercise 4
Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5 Exercise 5
Exercise 6 Exercise 6 Exercise 6 Exercise 6 Exercise 6
Exercise 7 Exercise 7 Exercise 7 Exercise 7 Exercise 7
Exercise 8 Exercise 8 Exercise 8
Exercise 9 Exercise 9
Exercise 10 Exercise 10
Exercise 11 Exercise 11
Exercise 12 Exercise 12
Exercise 13 Exercise 13
Exercise 14
Exercise 15
Exercise 16
Exercise 17
Exercise 18
Exercise 19
Section 11.1 Section 11.2 Section 11.3 Section 11.4 Section 11.5 Section 11.6
Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution
Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution
Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution
Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution
Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution
Exercise 6 | Solution Exercise 6 | Solution Exercise 6 | Solution
Exercise 7 | Solution Exercise 7 | Solution Exercise 7 | Solution
Exercise 8 | Solution Exercise 8 | Solution
Exercise 9 | Solution Exercise 9 | Solution
Section 12.1 Section 12.2 Section 12.3 Section 12.4 Section 12.5
Exercise 1 | Solution Exercise 1 | Solution Exercise 1 Exercise 1 Exercise 1
Exercise 2 | Solution Exercise 2 | Solution Exercise 2 Exercise 2 Exercise 2
Exercise 3 | Solution Exercise 3 | Solution Exercise 3 Exercise 3 Exercise 3
Exercise 4 | Solution Exercise 4 | Solution Exercise 4 Exercise 4 Exercise 4
Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution Exercise 5 Exercise 5
Exercise 6 | Solution Exercise 6 | Solution Exercise 6 | Solution Exercise 6 Exercise 6
Exercise 7 | Solution Exercise 7 | Solution Exercise 7 | Solution Exercise 7
Exercise 8 | Solution Exercise 8 | Solution Exercise 8 | Solution
Exercise 9 | Solution Exercise 9 | Solution Exercise 9
Exercise 10 | Solution Exercise 10 | Solution
Exercise 11 | Solution Exercise 11 | Solution
Exercise 12 | Solution Exercise 12 | Solution
Exercise 13 | Solution
Section 13.1 Section 13.2 Section 13.3 Section 13.4 Section 13.5
Exercise 1 Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution
Exercise 2 Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution
Exercise 3 Exercise 3 | Solution Exercise 3 | Solution
Exercise 4 Exercise 4 | Solution Exercise 4 | Solution
Exercise 5 Exercise 5 | Solution Exercise 5 | Solution
Exercise 6 | Solution Exercise 6 | Solution Exercise 6 | Solution
Exercise 7 Exercise 7 | Solution Exercise 7 | Solution
Exercise 8 Exercise 8 | Solution
Exercise 9 | Solution
Exercise 10 | Solution
Exercise 11 | Solution
Section 14.1 Section 14.2 Section 14.3 Section 14.4 Section 14.5
Exercise 1 Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution Exercise 1 | Solution
Exercise 2 Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution Exercise 2 | Solution
Exercise 3 Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution Exercise 3 | Solution
Exercise 4 Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution Exercise 4 | Solution
Exercise 5 Exercise 5 | Solution Exercise 5 | Solution Exercise 5 | Solution
Exercise 6 Exercise 6 | Solution Exercise 6 | Solution Exercise 6 | Solution
Exercise 7 Exercise 7 | Solution Exercise 7 | Solution Exercise 7 | Solution
Exercise 8 | Solution Exercise 8 | Solution Exercise 8 | Solution
Exercise 9 Exercise 9 | Solution Exercise 9 | Solution
Exercise 10 | Solution Exercise 10 | Solution Exercise 10 | Solution
Exercise 11 | Solution Exercise 11 | Solution Exercise 11 | Solution
Exercise 12 Exercise 12 | Solution
Exercise 13 | Solution