Let f: C → C be differentiable at zo. Considering f as a map R? –→ R², prove that f'(zo) = kR where k is a non-negative constant, and R is a 2 x 2 rotation matrix; that is, a matrix of the form cos(4) - sin(0) ] – sin(0) sin(0) cos(0) where 0 E (-T , T]. If f = u + iv for functions u, v: R² → R, what are k and R in terms of u and v?

Elementary Linear Algebra (MindTap Course List)
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ISBN:9781305658004
Author:Ron Larson
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Chapter7: Eigenvalues And Eigenvectors
Section7.CM: Cumulative Review
Problem 25CM: Find a basis B for R3 such that the matrix for the linear transformation T:R3R3,...
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Let f: C → C be differentiable at zo. Considering f as a map R? –→ R², prove
that f'(zo) = kR where k is a non-negative constant, and R is a 2 x 2 rotation
matrix; that is, a matrix of the form
cos(4) - sin(0) ]
– sin(0)
sin(0) cos(0)
where 0 E (-T , T].
If f = u + iv for functions u, v: R² → R, what are k and R in terms of u and v?
Transcribed Image Text:Let f: C → C be differentiable at zo. Considering f as a map R? –→ R², prove that f'(zo) = kR where k is a non-negative constant, and R is a 2 x 2 rotation matrix; that is, a matrix of the form cos(4) - sin(0) ] – sin(0) sin(0) cos(0) where 0 E (-T , T]. If f = u + iv for functions u, v: R² → R, what are k and R in terms of u and v?
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