Let a X, s < r, V = {x X : s < p(x, a)
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V = {x ∈ X : s < p(x, a) < r), and E = {x ∈ X : s < p(x, a) < r).
Prove that V is open and E is closed. _
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Let y V x X s px a r and let minpy a s r py a If w B y then pw a pw ...View the full answer
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