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K906

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X(2), X(3), X(485), X(486), X(524), X(1352), X(1689), X(1690), X(3413), X(3414), X(7618)

See Table 62 for explanations where K906 is KWpK(X3) and K801 = KWpK(X5).

K906 is a nodal cubic with node X(2) and nodal tangents passing through X(13), X(14) respectively.

It has three real asymptotes, namely the lines X(3)X(3413), X(3)X(3414), X(381)X(524).

The tangent at X(3) passes through X(1352) which is the tangential of X(3). The polar conic of X(3) is the complement of the Kiepert hyperbola.

X(5108) is the Stuyvaert point of K906 i.e. the unique point whose polar conic is a circle. This circle (C) passes through X(2), X(13), X(14), X(111), X(476). It is the Psi transform of the Fermat axis.