Misprints in the August 1998 edition of "Linearity"

• Page 8, line -2 (i.e., second line from bottom): upsilon should be \vec u.
• Page 11, statement of Example 5: (1,1,0) should be (2,2,0).
• Page 14, Ex. 1.2.16: Delete "+ <1,2,3>". (The statement of the problem clearly calls for a line through the origin.)
• Page 33, Example 7, third matrix of solution, second row: The nonzero elements should be 16 and -8, not 2 and -1. And therefore, the instruction for what to do to that row in the next step is to divide by 16, not by 2.
• Page 33, line -2: Right-hand side of equation should be 0, not 3.
• Page 44: Last matrix should be

  15     8

    8    15

• Page 53, Ex. 2.2.14: Matrix C should be

  -1      -3

    3    -4

• Page 92, Ex. 3.2.4: Interchange x and z.
• Page 111, lines 2 and 10: The denominator ||Delta x|| should be ||Delta u||.
• Page 126, Def. 1b: Insert "(which are vectors in T)" after "v_1, ..., v_n". (Otherwise we run into trouble with situations like Example 8 on page 130.)
• Page 147, 3rd set of equations: Change y to d (i.e., d = 2x - y).
• Page 168, Ex. 4.5.12: Change "4.4.16" to "4.4.18".
• Page 169, Ex. 4.5.14: Change "4.4.18" to "4.4.20".
• Page 222, last displayed equation: "(r_1 s_1)" should be "(r_1 r_2)" (a column vector, with different second element).
• Page 226 is missing in the instructor/grader copies, but apparently not in the student copies. Replacement pages were distributed (unnecessarily).
• Page 245, Ex. 6.3.2: Calculate U'(t), U'(t)U(t)^{-1}, U(0), and U'(0). [You knew it wasn't supposed to be that trivial, didn't you?]
• Page 304, Example: 3rd eigenvalue is -2, not 2.

Last modified Mon 23 Nov 98