Search Results for: 11A25

Two arithmetic functions related to Euler’s and Dedekind’s functions

Krassimir Atanassov Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 30, 2024, Number 1, Pages 179–183 DOI: 10.7546/nntdm.2024.30.1.179-183 Full paper (PDF, 225 Kb) Details Authors and affiliations Krassimir Atanassov Department of Bioinformatics and Mathematical … Continue reading →

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On certain arithmetical products involving the divisors of an integer

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 30, 2024, Number 1, Pages 111–115 DOI: 10.7546/nntdm.2024.30.1.111-115 Full paper (PDF, 210 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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On a modification of Set(n)

Krassimir T. Atanassov and József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 4, Pages 813–819 DOI: 10.7546/nntdm.2023.29.4.813-819 Full paper (PDF, 300 Kb) Details Authors and affiliations Krassimir T. Atanassov … Continue reading →

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Lower bounds on expressions dependent on functions φ(n), ψ(n) and σ(n)

Stoyan Dimitrov Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 4, Pages 713–716 DOI: 10.7546/nntdm.2023.29.4.713-716 Full paper (PDF, 247 Kb) Details Authors and affiliations Stoyan Dimitrov Department of Bioinformatics and Mathematical … Continue reading →

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Objects generated by an arbitrary natural number. Part 4: New aspects

Krassimir Atanassov Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 3, Pages 589–597 DOI: 10.7546/nntdm.2023.29.3.589-597 Full paper (PDF, 229 Kb) Details Authors and affiliations Krassimir Atanassov 1   Department of Bioinformatics and Mathematical … Continue reading →

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On certain inequalities for the prime counting function – Part III

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 3, Pages 454–461 DOI: 10.7546/nntdm.2023.29.3.454-461 Full paper (PDF, 259 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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On certain arithmetical functions of exponents in the factorization of integers

József Sándor and Krassimir T. Atanassov Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 2, Pages 378–388 DOI: 10.7546/nntdm.2023.29.2.378-388 Full paper (PDF, 246 Kb) Details Authors and affiliations József Sándor Department … Continue reading →

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A class of solutions of the equation d(n2) = d(φ(n))

Zahra Amroune, Djamel Bellaouar and Abdelmadjid Boudaoud Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 2, Pages 284–309 DOI: 10.7546/nntdm.2023.29.2.284-309 Full paper (PDF, 309 Kb) Details Authors and affiliations Zahra Amroune … Continue reading →

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Quotients of arithmetical functions under the Dirichlet convolution

Pentti Haukkanen Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 2, Pages 185–194 DOI: 10.7546/nntdm.2023.29.2.185-194 Full paper (PDF, 189 Kb) Details Authors and affiliations Pentti Haukkanen Faculty of Information Technology and … Continue reading →

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Corrigendum to: “Some modular considerations regarding odd perfect numbers – Part II” [Notes on Number Theory and Discrete Mathematics, 2020, Vol. 26, No. 3, 8–24]

Jose Arnaldo Bebita Dris and Immanuel Tobias San Diego Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 29, 2023, Number 1, Pages 181–184 DOI: 10.7546/nntdm.2023.29.1.181-184 Download Corrigendum: PDF, 159 Kb) Details Authors and affiliations … Continue reading →

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