Common vector norms
L1 norm: ||v||₁ = |v₁| + |v₂| + ... (Manhattan distance). L2 norm: ||v||₂ = √(v₁² + v₂² + ...) (Euclidean distance). L∞ norm: ||v||∞ = max(|v₁|, |v₂|, ...) (Chebyshev distance).
The general Lp norm is (Σ|vᵢ|^p)^(1/p). L1 and L2 are special cases with p=1 and p=2.