Digital nets in dimension two with the optimal order of L p discrepancy
Journal de théorie des nombres de Bordeaux, Volume 31 (2019) no. 1, pp. 179-204.

We study the L p discrepancy of two-dimensional digital nets for finite p. In the year 2001 Larcher and Pillichshammer identified a class of digital nets for which the symmetrized version in the sense of Davenport has L 2 discrepancy of the order logN/N, which is best possible due to the celebrated result of Roth. However, it remained open whether this discrepancy bound also holds for the original digital nets without any modification.

In the present paper we identify nets from the above mentioned class for which the symmetrization is not necessary in order to achieve the optimal order of L p discrepancy for all p[1,).

Our findings are in the spirit of a paper by Bilyk from 2013, who considered the L 2 discrepancy of lattices consisting of the elements (k/N,{kα}) for k=0,1,...,N-1, and who gave Diophantine properties of α which guarantee the optimal order of L 2 discrepancy.

Nous étudions la discrépance L p (p[1,)) de réseaux digitaux de dimension 2. En 2001, Larcher et Pillichshammer ont identifié une classe de (0,n,2)-réseaux pour lesquels la version symétrisée au sens de Davenport a une discrépance L 2 d’ordre logN/N, qui est optimal grâce au résultat célèbre de Roth. Cependant la question de savoir si la même borne s’applique à la discrépance des réseaux originaux est restée ouverte.

Dans cet article, nous identifions les réseaux digitaux de la classe susmentionnée pour lesquels la symétrisation n’est pas nécessaire pour obtenir l’ordre optimal de la discrépance L p pour p[1,).

Ce résultat est dans l’esprit d’un article de Bilyk de 2013, qui a étudié la discrépance L 2 des ensembles des points de la forme (k/N,{kα}) pour k=0,1,...,N-1 et a donné des propriétés diophantiennes de α qui garantissent l’ordre optimal de la discrépance L 2 .

Received:
Accepted:
Published online:
DOI: 10.5802/jtnb.1074
Classification: 11N06, 11K38
Keywords: $L_p$ discrepancy, digital nets, Hammersley net
Ralph Kritzinger 1; Friedrich Pillichshammer 1

1 Altenbergerstr. 69 4040 Linz, Austria
License: CC-BY-ND 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights
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Ralph Kritzinger; Friedrich Pillichshammer. Digital nets in dimension two with the optimal order of $L_p$ discrepancy. Journal de théorie des nombres de Bordeaux, Volume 31 (2019) no. 1, pp. 179-204. doi : 10.5802/jtnb.1074. https://jtnb.centre-mersenne.org/articles/10.5802/jtnb.1074/

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