Complex sentence: Taxicab geometry, considered by Hermann Minkowski in the 19th century, is a form of geometry in which the usual metric of Euclidean geometry is replaced by a new metric in which the distance between two points is the sum of the absolute differences of their coordinates.
Split into simpler sentences: Taxicab geometry, considered by Hermann Minkowski in the 19th century, is a form of geometry. Here, in comparison to Euclidean geometry, the usual distance function or metric is replaced by a new metric in which the distance between two points is the sum of the absolute differences of their coordinates.