Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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(4) Let ƒ₂ = 0ƒ/əz and ƒz = 0ƒ/əz. Recall f = u + iv, the notation f
is used for the complex conjugate function u -
- iv.
(d) The Jacobian of f, viewed as a map U → R², is defined by
Jf = det (Df). Show that Jf = |fz|² - |fz|². In particular, if
ƒ € O(U), then Jƒ = |ƒ'|².
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Transcribed Image Text:(4) Let ƒ₂ = 0ƒ/əz and ƒz = 0ƒ/əz. Recall f = u + iv, the notation f is used for the complex conjugate function u - - iv. (d) The Jacobian of f, viewed as a map U → R², is defined by Jf = det (Df). Show that Jf = |fz|² - |fz|². In particular, if ƒ € O(U), then Jƒ = |ƒ'|².
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