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2017 | OriginalPaper | Buchkapitel

Intrinsic Difference Quotients

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Abstract

An alternative characterizations of intrinsic Lipschitz functions within Carnot groups through the boundedness of appropriately defined difference quotients is provided. It is also shown how intrinsic difference quotients along horizontal directions are naturally related with the intrinsic derivatives, introduced e.g. in Franchi et al. (Comm Anal Geom 11(5):909–944, 2003) and Ambrosio et al. (J Geom Anal 16:187–232, 2006) and used to characterize intrinsic real valued C 1 functions inside Heisenberg groups. Finally the question of the equivalence of the two conditions: (1) boundedness of horizontal intrinsic difference quotients and (2) intrinsic Lipschitz continuity is addressed in a few cases.

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Metadaten
Titel
Intrinsic Difference Quotients
verfasst von
Raul Paolo Serapioni
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-52742-0_10