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

You are not logged in. #1 20131111 04:08:53
Injectivity ProofSuppose that f: Z > Z, with f(x) = 3x^{3}  x. Is f injective? #3 20131111 06:40:21
Re: Injectivity ProofI see, that simplifies the problem quite a bit  thanks! 