T-Constant Logarithmic Linear Combination
This activity belongs to the GeoGebra book GeoGebra Principia.
It's worth noting that distances inversely proportional to two points do NOT give rise to T-circles, as was the case with Euclidean metric.
This implies that the possible definition of a circle as tbe locus of points in the plane whose ratio of distances to two fixed points is constant is not valid for every metric.
Author of the construction of GeoGebra: Rafael Losada.