X(198) (X(9)-CEVA CONJUGATE OF X(6))

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 Information from Kimberling's Encyclopedia of Triangle Centers

Trilinears           f(A,B,C) : f(B,C,A) : f(C,A,B), where f(A,B,C) = a(cos B + cos C - cos A - 1)
Barycentrics    af(A,B,C) : bf(B,C,A) : cf(C,A,B)

X(198) lies on these lines:
3,9    6,41    19,25    45,1030    64,71    100,346    101,102    154,212    208,227    218,579    284,859    478,577    958,966

X(198) = isogonal conjugate of X(189)
X(198) = X(I)-Ceva conjugate of X(J) for these (I,J): (3,55), (9,6), (223,221)
X(198) = crosspoint of X(40) and X(223)
X(198) = crosssum of X(I) and X(J) for these (I,J): (57,1422), (84,282), (513,1146), (650,1364), (1433,1436)
X(198) = crossdifference of any two points on line X(522)X(905)
X(198) = X(I)-beth conjugate of X(J) for these (I,J): (9,19), (101,198)

This is a joint work of
Humberto José Bortolossi, Lis Ingrid Roque Lopes Custódio and Suely Machado Meireles Dias.