Rational Steiner porism - Paul Yiu

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    Rational Steiner porism - Paul Yiu​

    We establish formulas relating the radii of neighboring circles in a Steiner chain, a chain of mutually tangent circles each tangent to two given ones, one in the interior of the other. From such we parametrize, for n = 3, 4, 6, all configurations of Steiner n-cycles of rational radii.

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    LTTK CTV, 9/10/19
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