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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 AI Lab) 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 ...
Schema (psychology) In psychology and cognitive science, a schema ( pl.: schemata or schemas) describes a pattern of thought or behavior that organizes categories of information and the relationships among them. [ 1][ 2] It can also be described as a mental structure of preconceived ideas, a framework representing some aspect of the world, or a ...
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 ...
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 :
Software versioning. Software versioning is the process of assigning either unique version names or unique version numbers to unique states of computer software. Within a given version number category (e.g., major or minor), these numbers are generally assigned in increasing order and correspond to new developments in the software.
Scheme was the first dialect of Lisp to choose lexical scope. It was also one of the first programming languages after Reynold's Definitional Language [ 15 ] to support first-class continuations . It had a large impact on the effort that led to the development of its sister-language, Common Lisp , to which Guy Steele was a contributor.
Definition. By definition, a morphism of schemes is just a morphism of locally ringed spaces . A scheme, by definition, has open affine charts and thus a morphism of schemes can also be described in terms of such charts (compare the definition of morphism of varieties ). [ 1] Let ƒ: X → Y be a morphism of schemes.