The intangents circle is the circumcircle of the intangents triangle. It has circle function l = ((-a + b + c) f(a, b, c))/(8a^2 b^2 c^2 cos A cos B cos C), where f(a, b, c) = a^5 - a^3 b^2 - a^2 b^3 + b^5 + a^3 b c + a^2 b^2 c - a b^3 c - b^4 c - a^3 c^2 + a^2 b c^2 + 2a b^2 c^2 - a^2 c^3 - a b c^3 - b c^4 + c^5, which is not a Kimberling center.
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