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Density theorems for anisotropic point configurations
- Publication Year :
- 2020
- Publisher :
- arXiv, 2020.
-
Abstract
- Several results in the existing literature establish Euclidean density theorems of the following strong type. These results claim that every set of positive upper Banach density in the Euclidean space of an appropriate dimension contains isometric copies of all sufficiently large elements of a prescribed family of finite point configurations. So far, all results of this type discussed linear isotropic dilates of a fixed point configuration. In this paper we initiate the study of analogous density theorems for families of point configurations generated by anisotropic dilations, i.e., families with power-type dependence on a single parameter interpreted as their size. More specifically, here we prove nonisotropic power-type generalizations of a result by Bourgain on vertices of a simplex, a result by Lyall and Magyar on vertices of a rectangular box, and a result on distance trees, which is a particular case of the treatise of distance graphs by Lyall and Magyar. Another source of motivation for this paper is providing additional evidence for the versatility of the approach stemming from the work of Cook, Magyar, and Pramanik and its modification used recently by Durcik and the present author. Finally, yet another purpose of this paper is to single out anisotropic multilinear singular integral operators associated with the above combinatorial problems, as they are interesting on their own.<br />Comment: 31 pages; v2: referee's suggestions incorporated; v3: skew simplices are also covered, suggestions by the second referee are incorporated
- Subjects :
- Pure mathematics
Multilinear map
Simplex
Euclidean space
General Mathematics
010102 general mathematics
Dimension (graph theory)
Euclidean Ramsey theory
point configuration
distance graph
Type (model theory)
Fixed point
01 natural sciences
Mathematics - Classical Analysis and ODEs
0103 physical sciences
Euclidean geometry
Classical Analysis and ODEs (math.CA)
FOS: Mathematics
Mathematics - Combinatorics
05D10, 28A75, 42B20
Point (geometry)
010307 mathematical physics
heat flow
singular integral
Combinatorics (math.CO)
0101 mathematics
Mathematics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....0ed837c3e8fe955c67e0ff0857dfbf35
- Full Text :
- https://doi.org/10.48550/arxiv.2008.01060