Fruit (slang) fruit" (and rarely "old tin of fruit") to the 1920s in Britain possibly deriving from the phrase "fruit of the womb". In the United States, however, both "fruit" and "fruitcake" are seen as negative with fruitcake likely originating from "nutty as a fruitcake" (a crazy person). A costermonger was a street seller of fruit and vegetables. The term, which derived from the words "costard" (a type of apple) and "monger", i.e. "seller", came to be particularly associated with the "barrow boys" of London who would sell their produce from a wheelbarrow or wheeled market stall. Costermongers have existed in London
History of type theory by introducing dependent types, which became known as intuitionistic type theory or Martin-Löf type theory. Martin-Löf's theory uses inductive types to represent unbounded data structures, such as natural numbers. The lambda cube was not a new type theory but a categorization of existing type theories. The eight corners of the cube included some existing theories with simply typed lambda calculus at the lowest corner and the calculus of constructions at the highest. History of type theory The type theory was initially created to avoid paradoxes in a variety of formal logics and rewrite systems. Later, type theory referred to a