t & · &1 and & · &2 be two equivalent norms on a vector space X. Prove that a sequence % xn & in X converges to x0 ∈ X in & · &1 if and only if it converges to x0 in & · &2.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Let & · &1 and & · &2 be two equivalent norms on a vector space
X. Prove that a sequence
%
xn
& in X converges to x0 ∈ X in & · &1 if
and only if it converges to x0 in & · &2.

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