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Brown Corpus
We must now show that on some component of the graph there exist two points for which the corresponding diagonal points in the C-plane are on opposite sides of C.
We again consider a fixed point P at Af and a variable point Q at Af on C.
We erect a square with PQ as a side and with free corners Af and Af adjacent to P and Q respectively.
As S varies from zero to T, the values of S for which Af and Af cross C will be denoted by Af and Af respectively.
We have Af, plus tangent points.
These s-values are just the ordinary values of Af.
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