Krassimir T. Atanassov
Notes on Number Theory and Discrete Mathematics, ISSN 1310-5132
Volume 12, 2006, Number 4, Pages 23—24
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Krassimir T. Atanassov 
CLBME – Bulg. Academy of Sci.
P.O.Box 12, Sofa-1113, Bulgaria
Abstract
In the present remark we shall formulate and discuss some extremal problems, related to arithmetic functions φ, ψ and σ (see, e.g., [1]).
References
- Nagell T., Introduction to number theory, John Wiley & Sons, New York, 1950.
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- Atanassov, K. (2011). Note on φ, ψ and σ-functions. Part 3. Notes on Number Theory and Discrete Mathematics, 17(3), 13-14.
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Cite this paper
Atanassov, K. T. (2006). Note on φ, ψ and σ functions. Notes on Number Theory and Discrete Mathematics, 12(4), 23-24.
