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1. (mathematics) an isotropic scaling transformation of an affine space with a single fixed point.
   "Successive applications of homotheties with coefficients k1 and k2 is either a homothety with coefficient k1k2, if the latter differs from 1, or a parallel translation, otherwise.";
   - homothecy

Type of: function, map, mapping, mathematical function, single-valued function

Encyclopedia: Homothety