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Scheme (mathematics) In mathematics, specifically algebraic geometry, a scheme is a structure that enlarges the notion of algebraic variety in several ways, such as taking account of multiplicities (the equations x = 0 and x2 = 0 define the same algebraic variety but different schemes) and allowing "varieties" defined over any commutative ring ...
Scheme (programming language) Scheme is a dialect of the Lisp family of programming languages. Scheme was created during the 1970s at the MIT Computer Science and Artificial Intelligence Laboratory (MIT CSAIL) and released by its developers, Guy L. Steele and Gerald Jay Sussman, via a series of memos now known as the Lambda Papers. It was the ...
Scheme (rhetoric), a figure of speech that changes a sentence's structure. Scam, an attempt to swindle or cheat people through deception. Get-rich-quick scheme, a plan to obtain high rates of return for a small investment. Matrix scheme, or ladder scheme, a business model involving the exchange of money for a product and a waiting list for a ...
A pyramid scheme is a business model which, rather than earning money (or providing returns on investments) by sale of legitimate products to an end consumer, mainly earns money by recruiting new members with the promise of payments (or services). [1][2] As the number of members multiplies, recruiting quickly becomes increasingly difficult ...
The history of the programming language Scheme begins with the development of earlier members of the Lisp family of languages during the second half of the twentieth century. During the design and development period of Scheme, language designers Guy L. Steele and Gerald Jay Sussman released an influential series of Massachusetts Institute of ...
By definition, if X, S are schemes (over some base scheme or ring B), then a morphism from S to X (over B) is an S-point of X and one writes: = {:} for the set of all S-points of X. This notion generalizes the notion of solutions to a system of polynomial equations in classical algebraic geometry.
Rhyme scheme. A rhyme scheme is the pattern of rhymes at the end of each line of a poem or song. It is usually referred to by using letters to indicate which lines rhyme; lines designated with the same letter all rhyme with each other. An example of the ABAB rhyming scheme, from "To Anthea, who may Command him Anything", by Robert Herrick:
Scam. A scam, or a confidence trick, is an attempt to defraud a person or group after first gaining their trust. Confidence tricks exploit victims using a combination of the victim's credulity, naïveté, compassion, vanity, confidence, irresponsibility, and greed. Researchers have defined confidence tricks as "a distinctive species of ...