Search Results for: 11A25

Power GCD and power LCM matrices defined on GCD-closed sets over unique factorization domains

Y. A. Awad, T. Kadri and R. H. Mghames Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 150—166 DOI: 10.7546/nntdm.2019.25.1.150-166 Download full paper: PDF, 225 Kb Details Authors and … Continue reading

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A note on the OEIS sequence A228059

Jose Arnaldo Bebita Dris and Doli-Jane Uvales Tejada Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 199—205 DOI: 10.7546/nntdm.2019.25.1.199-205 Download full paper: PDF, 153 Kb Details Authors and affiliations … Continue reading

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Inequalities between the arithmetic functions φ, ψ and σ. Part 1

Krassimir T. Atanassov and József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 50—53 DOI: 10.7546/nntdm.2019.25.1.50-53 Download full paper: PDF, 149 Kb Details Authors and affiliations Krassimir T. … Continue reading

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Minimal sets of shifted values of the Euler totient function

Martin Kreh and Katrin Neuenstein Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 36—47 DOI: 10.7546/nntdm.2019.25.1.36-47 Download full paper: PDF, 193 Kb Details Authors and affiliations Martin Kreh Institute … Continue reading

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New form of the Newton’s binomial theorem

Mladen V. Vassilev-Missana Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 48—49 DOI: 10.7546/nntdm.2019.25.1.48-49 Download full paper: PDF, 119 Kb Details Authors and affiliations Mladen V. Vassilev-Missana 5, V. … Continue reading

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A note on Euler’s totient function

József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 25, 2019, Number 1, Pages 32—35 DOI: 10.7546/nntdm.2019.25.1.32-35 Download full paper: PDF, 157 Kb Details Authors and affiliations József Sándor Department of Mathematics, Babes-Bolyai … Continue reading

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Revisiting some old results on odd perfect numbers

Jose Arnaldo Bebita Dris and Doli-Jane Uvales Tejada Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 24, 2018, Number 4, Pages 18—25 DOI: 10.7546/nntdm.2018.24.4.18-25 Download full paper: PDF, 177 Kb Details Authors and affiliations … Continue reading

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An identical equation for arithmetic functions of several variables and applications

Vichian Laohakosol and Pinthira Tangsupphathawat Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 24, 2018, Number 4, Pages 11—17 DOI: 10.7546/nntdm.2018.24.4.11-17 Download full paper: PDF, 180 Kb Details Authors and affiliations Vichian Laohakosol Department … Continue reading

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On a new arithmetic function

Krassimir T. Atanassov and József Sándor Notes on Number Theory and Discrete Mathematics Print ISSN 1310–5132, Online ISSN 2367–8275 Volume 24, 2018, Number 4, Pages 3—10 DOI: 10.7546/nntdm.2018.24.4.3-10 Download full paper: PDF, 142 Kb Details Authors and affiliations Krassimir T. … Continue reading

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On the Hadamard product of GCD and LCM matrices associated with semi-multiplicative functions

Ayse Nalli and Pentti Haukkanen Notes on Number Theory and Discrete Mathematics, ISSN 1310-5132 Volume 9, 2003, Number 4, Pages 90—98 Download full paper: PDF, 77 Kb Details Authors and affiliations Ayse Nalli Department of Mathematics, Faculty of Science and … Continue reading

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