Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #2 20130625 17:21:06
Re: Tautology and contradictionhi {7/3} You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #4 20130625 21:41:14
Re: Tautology and contradictionWell, contradiction is used for proving things in math. It's one of the major methods of proof besides the proof by induction. The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment 