loci

To this general subject matter Aristotle gives the name "Topics" (τόποι, loci, communes loci).

The solution of simultaneous equations is easily seen to be the values of x, y corresponding to the intersections of the loci.

My remembrance of dates is also nearly entirely dependent on a clear mental vision of their loci in the diagram.

The theory of loci is thus identical with that of curves (see Curve and Geometry: Analytical).