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ON THE SET OF KRONECKER NUMBERS

Published online by Cambridge University Press:  08 March 2024

SAYAN GOSWAMI*
Affiliation:
The Institute of Mathematical Sciences, A CI of Homi Bhabha National Institute, CIT Campus, Taramani, Chennai 600113, India
WEN HUANG
Affiliation:
School of Mathematical Sciences, University of Science and Technology of China, Hefei 230026, PR China e-mail: wenh@mail.ustc.edu.cn
XIAOSHENG WU
Affiliation:
School of Mathematics, Hefei University of Technology, Hefei 230009, PR China e-mail: xswu@amss.ac.cn

Abstract

A positive even number is said to be a Maillet number if it can be written as the difference between two primes, and a Kronecker number if it can be written in infinitely many ways as the difference between two primes. It is believed that all even numbers are Kronecker numbers. We study the division and multiplication of Kronecker numbers and show that these numbers are rather abundant. We prove that there is a computable constant k and a set D consisting of at most 720 computable Maillet numbers such that, for any integer n, $kn$ can be expressed as a product of a Kronecker number and a Maillet number in D. We also prove that every positive rational number can be written as a ratio of two Kronecker numbers.

MSC classification

Type
Research Article
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of Australian Mathematical Publishing Association Inc.

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Footnotes

The second author was supported in part by NSFC (Grant Nos. 12090012, 12090010) and the third author was supported in part by NSFC (Grant No. 12271135).

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