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TaxicabAlternative meaning: taxicab geometry. Hackney carriage). A taxicab (sometimes called taxi cab or hack is a vehicle for hire which conveys passengers between locations of their choice. In most other modes of public transport, the pick-up and drop-off loca Taxicab geometryTaxicab 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 th Taxicab numberIn mathematics, the n''th taxicab number typically denoted Ta n or Taxicab n , is defined as the least number which can be expressed as a sum of two positive cubes in n distinct ways, up to order of summands. Hardy and E. Wright proved in 1954 that such n