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X(3), X(98), X(485), X(486), X(1687), X(1688), X(2065), X(3564) inverses of X(485), X(486) (Vecten points) and X(2065) in the circumcircle 

K336 is another example of inversible pK. It is a circular cubic with singular focus X(2079), the inverse of X(115) in the circumcircle. K336 contains X(3564), the infinite point of the Vecten line i.e. the line X(5)X(6). K336 is the isogonal transform of K337 = pK(X232, X4), an antigonal pK. See CL019. See also Table 46 and Table 55. 
