5 ms·

the mother of all click-baits

• gridspy 10y ago
  Better title is 2 mod 2 == 0
  • catnaroek 10y ago
    In the study of rings and fields, one works with operations called “addition” and “multiplication”, typically written “+” and “*”, but which needn't have anything to do with number addition or multiplication. “Addition” and “multiplication” have identity elements called “0” and “1”, respectively, but again, they needn't have anything to do with the numbers 0 and 1. And, in a field of characteristic 2, there's no notion of 2, since “1 + 1” is by definition “0”.
    • gridspy 10y ago
      Putting "The sky is black" as a title seems incorrect to me, even though the statement "The sky is black on the Moon" is true.
      • catnaroek 10y ago
        +, × (or ·), 0 and 1 are standard notation in algebra for an arbitrary ring's addition, multiplication, additive identity and multiplicative identity. In that context, 1 + 1 = 0 isn't automatically false. It's just a statement that holds in some rings (e.g., F_2), but not in others (e.g., Z).
• viach 10y ago
  Exactly! I'm still clicking, just can't stop it...