ordinal sum

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• Ordinal notation — In mathematical logic and set theory, an ordinal notation is a finite sequence of symbols from a finite alphabet which names an ordinal number according to some scheme which gives meaning to the language. There are many such schemes of ordinal… …   Wikipedia

• Ordinal arithmetic — In the mathematical field of set theory, ordinal arithmetic describes the three usual operations on ordinal numbers: addition, multiplication, and exponentiation. Each can be defined in essentially two different ways: either by constructing an… …   Wikipedia

• Ordinal number — This article is about the mathematical concept. For number words denoting a position in a sequence ( first , second , third , etc.), see Ordinal number (linguistics). Representation of the ordinal numbers up to ωω. Each turn of the spiral… …   Wikipedia

• Ordinal collapsing function — In mathematical logic and set theory, an ordinal collapsing function (or projection function) is a technique for defining (notations for) certain recursive large countable ordinals, whose principle is to give names to certain ordinals much larger …   Wikipedia

• Ordinal — Nombre ordinal En linguistique, les mots premier, deuxième, troisième, quatrième, etc. s appellent des adjectifs numéraux ordinaux qui servent à préciser le rang d un objet dans une collection ou l ordre d un événement dans une succession. Cette… …   Wikipédia en Français

• Nombre Ordinal — En linguistique, les mots premier, deuxième, troisième, quatrième, etc. s appellent des adjectifs numéraux ordinaux qui servent à préciser le rang d un objet dans une collection ou l ordre d un événement dans une succession. Cette notion se… …   Wikipédia en Français

• Nombre ordinal — En mathématiques, on appelle nombre ordinal un objet permettant de caractériser le type d ordre d un ensemble bien ordonné quelconque. Comme, en linguistique, les mots premier, deuxième, troisième, quatrième, etc. s appellent des adjectifs… …   Wikipédia en Français

• Additively indecomposable ordinal — In set theory, a branch of mathematics, an additively indecomposable ordinal α is any ordinal number that is not 0 such that for any eta,gamma …   Wikipedia

• rank sum test — a nonparametric statistical test for ordinal data, testing the null hypothesis that two samples are drawn from the same population versus the alternative hypothesis that the two samples are drawn from two populations having probability… …   Medical dictionary

• Construction of t-norms — In mathematics, t norms are a special kind of binary operations on the real unit interval [0, 1]. Various constructions of t norms, either by explicit definition or by transformation from previously known functions, provide a plenitude of… …   Wikipedia

• Kleene's O — In set theory and computability theory, Kleene s mathcal{O} is a canonical subset of the natural numbers when regarded as ordinal notations. It contains ordinal notations for every recursive ordinal, that is, ordinals below Church–Kleene ordinal …   Wikipedia