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X(2), X(3), X(23), X(111), X(187), X(2930), X(3098), X(14830)

vertices of the CircumTangential triangle

Y = X(3)X(67) /\ X(30)X(98) = X(14830)

fixed points of the involution f in page K024

K728 is pkT(X23) as defined in the page K024.

It is the only circular cubic of this type. The singular focus is X(14681).