Consider the set S = {1,2,3} with the discrete metric. Define f: S → R² by f(1) = (-1,0) f(2)=(,0) and f(3) = (0,3). If R is equipped with the euclidean metric, then f is an isometry.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Example 1.2.9
Consider the set S = {1,2,3} with the discrete metric. Define f: S → R²
by ƒ(1) = (–½, 0) ƒ(2) = (½⁄,0)_and_f(3) = (0, 1³). If R is equipped with
the euclidean metric, then f is an isometry.
Transcribed Image Text:Example 1.2.9 Consider the set S = {1,2,3} with the discrete metric. Define f: S → R² by ƒ(1) = (–½, 0) ƒ(2) = (½⁄,0)_and_f(3) = (0, 1³). If R is equipped with the euclidean metric, then f is an isometry.
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