The point at which the three lines connecting the vertices of two perspective triangles concur, sometimes also called the perspective center, homology center, or pole. In the plane of a reference triangle Δ A B C, the perspector of Δ A B C and its polar triangle with respect to a given conic is called the perspector of that conic. The perspector is not defined for conics with respect to which Δ A B C is self-polar. For an inconic, the perspector is the Brianchon point of the conic. The following table summarizes perspectors of some named triangle conics corresponding to Kimberling centers.
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