Geodesic
Homotopy and the Kestelman–Borwein–Ditor Theorem
Canadian mathematical bulletin, Tome 54 (2011) no. 1, pp. 12-20

Voir la notice de l'article provenant de la source Cambridge University Press

The Kestelman–Borwein–Ditor Theorem, on embedding a null sequence by translation in (measure/category) “large” sets has two generalizations. Miller replaces the translated sequence by a “sequence homotopic to the identity”. The authors, in a previous paper, replace points by functions: a uniform functional null sequence replaces the null sequence, and translation receives a functional form. We give a unified approach to results of this kind. In particular, we show that (i) Miller's homotopy version follows fromthe functional version, and (ii) the pointwise instance of the functional version follows from Miller's homotopy version.
DOI : 10.4153/CMB-2010-093-4
Mots-clés : 26A03, measure, category, measure-category duality, differentiable homotopy 
Bingham, N. H.; Ostaszewski, A. J. Homotopy and the Kestelman–Borwein–Ditor Theorem. Canadian mathematical bulletin, Tome 54 (2011) no. 1, pp. 12-20. doi: 10.4153/CMB-2010-093-4
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