Problem Set 5 has been posted (with corrections). 

LP Trial Software may be downloaded from links below.

Notes #1 and #2 on Linear Programming have been posted.
 

Problem Set 1 -       Answers
Problem Set 2 -       Answers
Problem Set 3 -       Answers
Problem Set 4 -
Problem Set 5 (corrected) -

Input-Output Analysis (Chiang)
Eigenvalues and eigenvectors Note1
Eigenvalues and eigenvectors Note 2
Quadratic Forms Note 1
Maximum Value Functions and the Envelope Theorem
Mathematics for Microeconomics Powerpoint
Mathematics for Microeconomics PDF File
Homogeneous and Homothetic Functions
Concavity and Convexity
Quasiconcavity/quasiconvexity
CES Production Functions
Nonlinear Programming
Nonlinear Programming II
Nonlinear Programming III
Linear Programming 1
Linear Programming 2

Gipals (LP Software)
Lindo (LP Software)