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∑ a^4 (b^2 - b c + c^2) (b^2 + b c + c^2) (c y - b z) y z = 0

X(1), X(31), X(48), X(75), X(1469), X(2186), X(2275), X(2276), X(3056), X(3116)

vertices of the incentral triangle

Geometric properties :

K1015 is the barycentric product X(1) x K1012.

It is a cubic anharmonically equivalent to K020 as in Table 66.