Xiang Xu

Teaching: Math 251-Ordinary and Partial differential equations

Sections 001 in Spring 2008.

The syllabus is here available.

Email: xux102@psu.edu

Office hours: 4:30pm-5:30pm Monday and 12:00pm-1:00pm Friday in McAllister 331

Homework problems

Homework 1 due Jan 23rd, compressed postscript, Solution to HW 1

Homework 2 due Jan 28th, compressed postscript, Solution to HW 2

Homework 3 Due Feb 6th, Solution to HW 3

Homework 4 Due Feb 13th,

Homework 5 Due Feb 20th,

Homework 7 Due Mar 19th,

Homework 8 Due Mar 26th,

Homework 9 Due Apr 2nd,

Homework 10 Due Apr 23,

Homework 11 Due May 2,

Solution to quiz 1

Solution to quiz 3

Solution to quiz 4

Solution to quiz 5

Solution to quiz 6

Solution to quiz 7

example exams: 1st midterm

Exam I, Summer 2007, solutions
Spring 2007, solutions
Summer 2006, Solutions
Fall 2005, Solutions
Spring 2005, Solutions

2nd midterm

Summer 2007, Solutions.
Spring 2007.
Summer 2006, Solutions.
Fall 2005.
Spring 2005, Solutions.

Final

Spring 2007, Solutions
Fall 2005, Solutions
Spring 2005
Spring 2004, Solutions
Fall 2003, Solutions
Fall 2007

Here is a detailed Study Guide for the final.