Math. 311                                         Spring 1999

                     HOMEWORK SUMMARY REPORT


  Assignment number: 5         
    
  Problem number: 4.1.12 

  Number of papers received:  6

  Reviewing committee (Greek letter): Theta      

  List all participating members: Jason Glenn, Matt Jones, Clay Peterson



  Author[s] of paper[s] chosen for publication: Matthew Webster                 



  Comments: Pretty much everyone did the problem correctly.  Some people
got the value of the determinant wrong, but their final answer was still
correct.


INSTRUCTOR'S COMMENT:  In spite of what the reviewers said on some of the
individual reviews (and other reviewers said earlier about invertibility
of matrices), it is not necessary to calculate the determinant in such
problems.  A successful row reduction to the identity proves that the set
is independent, or that the matrix is invertible.