Some road type classifications are influenced by city size, traffic density, and regional conventions. For example, in a very large city a primary street may have three or more lanes in each direction on a divided road. While in a town of dirt roads, the only paved single lane street could be a primary street.
subset - a set whose members are members of another set; a set contained within another set. set - (mathematics) an abstract collection of numbers or symbols; the set of prime numbers is infinite. Translations. podmnoÅ¾ina.
Sets and subsets. 2.1 Introduction. A well-deï¬ned collection of objects is known as a set. This concept, in. its complete generality, is of great importance in mathematics since all. of mathematics can be developed by starting from it. The various pieces of furniture in a given room form a set.