EM2000, corrections.

Chapter 21:

page 257, line 6-:  Fig 20.2    should be    Fig 21.2
page 266, line 4-:  Fig 20.8    should be   Fig 21.7
page 267, line 9:   Fig 20.8    should be   Fig 21.8
page 269, line 8-:  Fig 21.26    is missing
page 269, line 5-,7-:  x should be n
page 271, line 5-:  Proposition 21.10   should be   Problem 21.10
page 273, line 3-:  (45.51)   should be   (21.17)
page 278, line 2:  Fig 21.24    is missing
page 278, line 3-:  imples  should be   implies

Chapter 28:

page 362, line 10:  u(n+1)  should be   u⁽ⁿ⁺¹⁾

/stig