While we have tried to make the notes correct in every detail, a small number of typographical errors still remain. Here we note the ones that may cause confusion.

Page 4.

Trick's office number is 257C and fax is 268-7057.

Page 13 (top).

B should be .

Pag 23 (top).

Definition of determinant for 2 by 2 case should be .

• About this document ...