Prove the contraction mapping principle: Allow ∅ D ⊂ RN be a shut established and let file : D → D be described as a functionality. Suppose that there exists r ∈ (0, 1) this kind of that Anatomy，astronomy，biochemistry，biology，biostatistics，botany，chemical engineering，chemistry，civil engineering，dentistry， ecology，electrical engineering，engineering，epidemiology， genetics... https://essayv.com/essay/