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3 -7 b' = (xa+yb) - q(ua+vb)
9 10 "equivalently" instead of "equivently"
16 -15 After "...time intervals." insert "Now signal pulse emissions and receptions can be drawn on the two dimensional sqaure grid in which each point has a time and a velocity component."
19 17 The number 225 should be 232. [The error here comes from the authors' ingnorance of HTML's limitation regarding superscripts: you cannot have two supescripts superimposed, so the intended superscript 25 is replaced by 32.]
19 20 The "p" in "then p divides" should be italicised.
31 12 the sequence 1, 0, 0, 0, 1, 1, 1, 0, 0, ...
31 -16 s-n-2 should be sn-2
31 -9 The statement of the theorem then expresses ....
33 15 "... be a polynomial of degree at least 1."
32 7 Replace "X2+X2+1" by "X2+X+1"
49 -3 Replace "ag" by "ag"
49 -2 Replace "realtion" by "relation"
52 4 Replace "let a be" by "let a be"
62 -12 R instead of R so as to get "is an invertible element of R. Show ..."
82 -18 In Lemma 39: equivalence instead of equvalence.
87 -3 10,000 instead of 10.000
111 -2 Remove the first part of the line up to (and including) "that"
116 14 Replace f by f': "It is easy to see that f' is a morphism."
116 19 Since f'(R) should be f'(R/I).
119 -14 Insert "that" so as to get "... Part 3 is the fact that any two ..."
121 -4 Remove once "the is" so as to get "is the n by n identity matrix."
124 -10 In this exercise (no. 7) we want the rational numbers: Q rather than Q (whatever that is).
125 -13 "Show that S = {0, 1 = alpha0, alpha = alpha1,... alpha14}."
127 -17 Replace "))" by ")"
127 -17 Replace "Cg = Ce" by "Cg(x) = Ce(x)"
128 6 missing ) after second b
134 -10 First X should be replaced by Sym( X).
136 24 After "Proof" insert: By Theorem 9 with f = id and X = Gb1, Gb1b2, Gb1,b2b3, ..., respectively,
151 -2 a instead of a
152 1 a instead of a
153 19 } missing at the end (before ".", of first line Exercise 32).
153 -13 a = i + 21/2.
154 12 a instead of a