Let f: C → C be differentiable at zo. Considering f as a map R? → R², 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 prove | Cos(0) - sin(8) ] sin(0) cos(0) where 0 E (-1, T]. If f = u + iv for functions u, v: R² → R, what are k and R in terms of u and v?

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.6: Applications And The Perron-frobenius Theorem
Problem 69EQ: Let x=x(t) be a twice-differentiable function and consider the second order differential equation...
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Let f: C → C be differentiable at zo. Considering f as a map R? → R²,
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
prove
| Cos(0) - sin(8) ]
sin(0) cos(0)
where 0 E (-1, 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, 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 prove | Cos(0) - sin(8) ] sin(0) cos(0) where 0 E (-1, 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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