EDB — 16J

Exercises

1. [16J] Given \(L∈(0,1)\) if \(f:ℝ→ℝ\) satisfies

   \[ |f(x)-f(y)|≤ L|x-y|\quad ∀ x,y∈ℝ \]

   Then there is only one ”fixed point” that is a point \(x\) for which \(f(x)=x\).