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K915

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X(1), X(58), X(79), X(3244), X(5563), X(10481)

infinite points of pK(X6, X10)

points on (O) of pK(X6, X3244)

A' = 0 : a + 2 b – c : a – b + 2 c, B' and C' likewise

points R0, R1, R2, R3 described in the page K755

Geometric properties :

K915 is a special cubic of CL066. See also K360.

It is a nodal circum-cubic with node the incenter X(1) and nodal tangents parallel to the asymptotes of the Feuerbach hyperbola.