Find a continuous function. f:D → R (where R is the real number line) such that f((x1, y1)) = f((x2, y2)) IFF (x1, y1) ∼ (x2, y2) b) What space is D/~ homeomorphic to and why?
Find a continuous function. f:D → R (where R is the real number line) such that f((x1, y1)) = f((x2, y2)) IFF (x1, y1) ∼ (x2, y2) b) What space is D/~ homeomorphic to and why?
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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Let D = {(x, y) : x2 + y2 ≤ 1} be the unit disk in the plane. Place an equivalence relation ∼ on D by (x1, y1) ∼ (x2, y2) IFF x12 + y12 = x22 + y22.
a) Find a continuous function. f:D → R (where R is the real number line) such that f((x1, y1)) = f((x2, y2)) IFF (x1, y1) ∼ (x2, y2)
b) What space is D/~ homeomorphic to and why?
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