Math. 311 Fall 1998
HOMEWORK SUMMARY REPORT
Week number: 10
Problem number: 6.2.18
Number of papers received: 3
Reviewing committee (Greek letter): eta
List all participating members: Jeremy Ruple, Jennifer Sample
Author[s] of paper[s] chosen for publication: Andrew H. Barkley
Comments: This paper is very neat and professional looking. The
explanation is straight forward and thourough.
INSTRUCTOR'S COMMENT: Andrew's proof is correct and instructive, but not
exactly what I expected. The most straightforward approach is:
1) Prove that every element of S belongs to S-perp-perp.
2) Prove that every element of S-perp-perp belongs to S. Here you start
by breaking the vector into a part in S and a part in S-perp.