2020
DOI: 10.2140/apde.2020.13.765
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On the discrete Fuglede and Pompeiu problems

Abstract: We investigate the discrete Fuglede's conjecture and Pompeiu problem on finite abelian groups and develop a strong connection between the two problems. We give a geometric condition under which a multiset of a finite abelian group has the discrete Pompeiu property. Using this description and the revealed connection we prove that Fuglede's conjecture holds for Z p n q 2 , where p and q are different primes. In particular, we show that every spectral subset of Z p n q 2 tiles the group. Further, using our combin… Show more

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Cited by 27 publications
(43 citation statements)
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“…An alternative proof that (i) implies (ii) (without using Theorem 4.7; compare [16, 42]) is as follows. By classic results on vanishing sums of roots of unity [3, 28, 32, 35, 36, 38], if and only if is a linear combination of the polynomials , where p runs over all prime divisors of N , with integer (but not necessarily nonnegative) coefficients.…”
Section: Cuboidsmentioning
confidence: 99%
See 1 more Smart Citation
“…An alternative proof that (i) implies (ii) (without using Theorem 4.7; compare [16, 42]) is as follows. By classic results on vanishing sums of roots of unity [3, 28, 32, 35, 36, 38], if and only if is a linear combination of the polynomials , where p runs over all prime divisors of N , with integer (but not necessarily nonnegative) coefficients.…”
Section: Cuboidsmentioning
confidence: 99%
“…Iosevich, Katz and Tao [14] proved in 2003 that Fuglede’s conjecture holds for convex sets in ; an analogous result in higher dimensions was proved only recently, by Greenfeld and Lev [12] for and by Lev and Matolcsi [29] for general n . There has also been extensive work on the finite abelian group analogue of the conjecture [7, 6, 15, 16, 17, 18, 30, 31, 39, 40, 41, 48].…”
Section: Introductionmentioning
confidence: 99%
“…It is proved in [10,16] that Fuglede's conjecture holds for every proper subgroup of Z 2 p × Z q . Hence we may assume neither S nor Λ are contained in a proper subgroup of Z 2 p × Z q , see Lemma 4.3 and Lemma 4.4 in [11].…”
Section: Spectral-tilementioning
confidence: 99%
“…Remark that in some other works (see, e.g., [8], [9], [10], [11], [12], [13]) similar reformulations of tilings in terms of polynomials are introduced, and, moreover, similarly to this work, cyclotomic polynomials are applied. However, in such works the condition (T 1), first introduced in [8], is considered and used only for tilings of multiplicity 1.…”
Section: Introductionmentioning
confidence: 99%