Partial Errata to Some of the Math in Amir Alexander's Duel at Dawn

Here are some minor errata for Amir Alexander's book Duel at Dawn.

• p. 287, line 7 up:
  "limit there" should be "limit y there"
• p. 287, line 6 up:
  "if |x-y| < δ then |f(x)-f(x₀)|<ε" should be
  "if |x-x₀| < δ , then |f(x)-y|<ε"
• p. 190, line 1 down:
  "Δ x/ Δ y" should be "Δ y/ Δ x"
• p. 194, line 3 up:
  "ω²=(-1+(-3)^1/2)/2" should be "ω²=(-1-(-3)^1/2)/2"
• p. 203, line 10 up:
  "products of" should be "sums of products of"
• p. 206, line 3:
  "...predecessors G^(k-1), until ..." should be
  "...predecessors G^(k-1), and the number of elements of G^(k) divided by the number of elements of G^(k-1) are prime numbers, until ..."
• p. 221, line 6 up: "than at some" should be "then at some"