Suppose that U is a linear transformation from R" into R" that is isometric, meaning that ||Ux|| = ||x|| for all x E R". (a) Prove that (Ux,Uy) = (x,y) for all x, y E R". (b) If {v1,…,vk} is an orthonormal set in R", show that {Uv1,...,Uvg} is also orthonormal.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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I.
Suppose that U is a linear transformation from R" into R" that is isometric, meaning that
||Ux|| = ||x|| for all x E R".
(a) Prove that (Ux,Uy) = (x, y) for all x, y E R".
(b) If {v1,..., Vk} is an orthonormal set in R", show that {Uv1,...,Uvg} is also orthonormal.
Transcribed Image Text:I. Suppose that U is a linear transformation from R" into R" that is isometric, meaning that ||Ux|| = ||x|| for all x E R". (a) Prove that (Ux,Uy) = (x, y) for all x, y E R". (b) If {v1,..., Vk} is an orthonormal set in R", show that {Uv1,...,Uvg} is also orthonormal.
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