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Thomae's Function
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Geliefert zwischen Mo., 13.04.2026 und Di., 14.04.2026
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High Quality Content by WIKIPEDIA articles! Thomae's function, named after Johannes Karl Thomae, also known as the popcorn function, the raindrop function, the ruler function, the Riemann function or the Stars over Babylon (by John Horton Conway) is a modification of the Dirichlet function. A natural followup question one might ask is if there is a function which is continuous on the rational numbers and discontinuous on the irrational numbers. This turns out to be impossible; the set of discontinuities of any function must be an F-sigma set. If such a function existed, then the irrationals would be F-sigma and hence would also be a meager set. It would follow that the real numbers, being a union of the irrationals and the rationals (which is evidently meager), would also be a meager set. This would contradict the Baire category theorem.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786131141669
- Genre Maths
- Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
- Anzahl Seiten 84
- Herausgeber Betascript Publishing
- EAN 9786131141669
- Titel Thomae's Function
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