Page 16 - Section 1.3
The paragraph sandwiched between the definition and Theorem 1.5 should read:
Examples of relatively prime integers are 5 and 3, and 7 and 11. 7469 and 2387 are not relatively prime as Example 1.9 demonstrates. 15 and 35 are not relatively prime because gcd(15, 35) = 5. The only positive factor two relatively prime integers have in common is 1.
Page 41 - Section 1.6
In Exercise #6 the 26th letter of the ciphertext should be a "Q" and not an "O."
Page 50 Problem #3
This information should have been included in the statement of the problem: The number 7 can be associated with either P, Q, R, or S.
Page 72 - Section 2.3
In Exercise #9, Part (b), the word "diamond" should be "diamonds."
Page 73 (line 23)
A "?" is missing at the end of the sentence.
Page 111 (line 17)
The entry in the first row, fourth column of the matrix A X B should be 6 · 8 + 2 · 6.
Page 167 (Step 7)
Note that the space character appears between the letter Z and the number 1.
Page 170 Problem #1
The value of n should be 3365.
Page 190 (Exercises 2.4, #2)
Replace "p(E(F)" with "p(E∩F)"
Page 190 (Exercises 2.4, #4)
The solution that appears in the text is for part (b) of the problem. The solution for part (a) is C(5713,2) = 16,316,328.
This page was last edited on Thursday, June 14, 2012 8:30 AM .
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