Exercise. Suppose that X is a non-empty set, and that a function p : X x X R satisfies the following two conditions: a) For every x, y E X, we have p(x, y) = 0 if and only if x = y. %3D b) For every x, Y, z E X, we have p(x, y) < p(x, z) + p(y, z). Prove that p is a metric on X. Exercise, Suppose that (an)neN and (yn)nEN are two sequences in a metric space (X, p) such that xn x and yn y as n → 0o. Prove that the real sequence (p(xn, Yn))neN Converges to p(x, y) as n→ 0o. Exercise, a) For every ,x,y E R, let p(x, y) =| x² – y² |. Is pa metric
Exercise. Suppose that X is a non-empty set, and that a function p : X x X R satisfies the following two conditions: a) For every x, y E X, we have p(x, y) = 0 if and only if x = y. %3D b) For every x, Y, z E X, we have p(x, y) < p(x, z) + p(y, z). Prove that p is a metric on X. Exercise, Suppose that (an)neN and (yn)nEN are two sequences in a metric space (X, p) such that xn x and yn y as n → 0o. Prove that the real sequence (p(xn, Yn))neN Converges to p(x, y) as n→ 0o. Exercise, a) For every ,x,y E R, let p(x, y) =| x² – y² |. Is pa metric
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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