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Simple Function
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Geliefert zwischen Do., 29.01.2026 und Fr., 30.01.2026
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High Quality Content by WIKIPEDIA articles! In mathematical field of real analysis, a simple function is a real-valued function over a subset of the real line which attains only a finite number of values. Some authors also require simple functions to be measurable; as used in practice, they invariably are. A basic example of a simple function is the floor function over the half-open interval [1,9), whose only values are {1,2,3,4,5,6,7,8}. A more advanced example is the Dirichlet function over the real line, which takes the value 1 if x is rational and 0 otherwise. (Thus the "simple" of "simple function" has a technical meaning somewhat at odds with common language.) Simple functions are used as a first stage in the development of theories of integration, such as the Lebesgue integral, because it is very easy to create a definition of an integral for a simple function, and also, it is straightforward to approximate more general functions by sequences of simple functions.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131166624
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- EAN 9786131166624
- Format Fachbuch
- Titel Simple Function
- Herausgeber Betascript Publishing
- Anzahl Seiten 108
- Genre Mathematik
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