M 311 Spring 2004
HOMEWORK SUMMARY REPORT
Chapter number: 2
Section number: 2
Exercise number: 9
Number of papers received: 2
Reviewing committee: epsilon
List all participating committee members:
c-glaser, j-bosshard
Author(s) of paper(s) chosen for publication:
David White
James Macfarlane
Comments: Both papers were completely correct. Furthermore, we choose
both for publication as each uses a different method to reach the proof.
GRADER'S COMMENT: White's proof was much more clear and concise.
INSTRUCTOR'S COMMENT: Let me amplify that. Many properties of matrix
algebra, including the one in this problem, can be proved from other
general properties, without writing out matrices as tables of numbers.
When you do the latter, you are tempted to give a proof that is valid,
strictly speaking, only for 2 x 2 matrices.