Search Results for: 11A25

On a new additive arithmetic function related to a fixed integer

Mihoub Bouderbala and Meselem Karras Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 3, Pages 575–580 DOI: 10.7546/nntdm.2022.28.3.575-580 Full paper (PDF, 160 Kb) Details Authors and affiliations Mihoub Bouderbala Department of … Continue reading →

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Objects generated by an arbitrary natural number. Part 2: Modal aspect

Krassimir T. Atanassov Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 3, Pages 558–563 DOI: 10.7546/nntdm.2022.28.3.558-563 Full paper (PDF, 158 Kb) Details Authors and affiliations Krassimir T. Atanassov 1 Department of … Continue reading →

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On certain rational perfect numbers, II

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 3, Pages 525–532 DOI: 10.7546/nntdm.2022.28.3.525-532 Full paper (PDF, 171 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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Bi-unitary multiperfect numbers, IV(c)

Pentti Haukkanen Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 3, Pages 411–434 DOI: 10.7546/nntdm.2022.28.3.411-434 Full paper (PDF, 287 Kb) Details Authors and affiliations Pentti Haukkanen Faculty of Information Technology and … Continue reading →

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On certain equations and inequalities involving the arithmetical functions φ(n) and d(n)

József Sándor and Saunak Bhattacharjee Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 2, Pages 376–379 DOI: 10.7546/nntdm.2022.28.2.376-379 Full paper (PDF, 152 Kb) Details Authors and affiliations József Sándor Babeș-Bolyai University, … Continue reading →

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Perfect squares in the sum and difference of balancing-like numbers

M. K. Sahukar, Zafer Şiar, Refik Keskin and G. K. Panda Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 2, Pages 286–301 DOI: 10.7546/nntdm.2022.28.2.286-301 Full paper (PDF, 231 Kb) Details Authors … Continue reading →

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On certain rational perfect numbers

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 2, Pages 281–285 DOI: 10.7546/nntdm.2022.28.2.281-285 Full paper (PDF, 146 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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On the equation f(n2 − Dnm + m2) = f 2(n) − Df(n)f(m) + f 2(m)

B. M. Phong and R. B. Szeidl Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 2, Pages 240–251 DOI: 10.7546/nntdm.2022.28.2.240-251 Full paper (PDF, 192 Kb) Details Authors and affiliations B. M. … Continue reading →

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On certain inequalities for the prime counting function – Part II

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 28, 2022, Number 1, Pages 124–128 DOI: 10.7546/nntdm.2022.28.1.124-128 Full paper (PDF, 149 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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On certain inequalities for the prime counting function

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 27, 2021, Number 4, Pages 149–153 DOI: 10.7546/nntdm.2021.27.4.149-153 Full paper (PDF, 148 Kb) Details Authors and affiliations József Sándor Department of Mathematics, Babeș-Bolyai University … Continue reading →

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