Let A, for i = 1,2,3, 4 be four distinct points in the complex plane and let Bi for i = 1,2, 3, 4 be as well four distinct points. Show that there exists a Mobius transformation sending A, to B, for i = 1,2,3, 4 if and only if the cross ratios satisfy (A1, A2, A3, A4) = (B1, B2, Ba, B4). %3D (Recall that the cross ratio is defined by (A, B, C, D) = 4-.B-D.)

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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Question 4,
Let A, for i 1,2, 3, 4 be four distinct points in the complex plane and let Bi
for i = 1,2, 3, 4 be as well four distinct points. Show that there exists a Mobius
transformation sending A, to B, for i = 1,2,3, 4 if and only if the cross ratios
satisfy
(A1, A2, A3, A4) = (B1, B2, B3, BA).
%3D
(Recall that the cross ratio is defined by (A, B, C, D) = 5-.)
-C B-D
Transcribed Image Text:Question 4, Let A, for i 1,2, 3, 4 be four distinct points in the complex plane and let Bi for i = 1,2, 3, 4 be as well four distinct points. Show that there exists a Mobius transformation sending A, to B, for i = 1,2,3, 4 if and only if the cross ratios satisfy (A1, A2, A3, A4) = (B1, B2, B3, BA). %3D (Recall that the cross ratio is defined by (A, B, C, D) = 5-.) -C B-D
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