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Mathematics of Computation
Journal of the American Mathematical Society
ISSN 1088-6842(e) ISSN 0025-5718(p)
     

On the equation $\sum _{p|N}\frac{1}{p}+\frac{1}{N}=1$, pseudoperfect numbers, and perfectly weighted graphs

Author(s): William Butske; Lynda M. Jaje; Daniel R. Mayernik.
Journal: Math. Comp. 69 (2000), 407-420.
MSC (1991): Primary 11D68; Secondary 11Y50, 05C50
Posted: August 19, 1999
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Abstract | References | Similar articles | Additional information

Abstract: We present all solutions to the equation $\sum _{p|N}\frac{1}{p}+\frac{1}{N}=1$ with at most eight primes, improve the bound on the nonsolvability of the Erdös-Moser equation $\sum _{j=1}^{m-1}j^n=m^n$, and discuss the computational search techniques used to generate examples of perfectly weighted graphs.


References:

[1]
D. Borewein, J. M. Borwein, P. B. Borwein and R. Girgensohn, Giuga's conjecture on primality, Amer. Math. Monthly 103 (1996), 40-50. MR 97b:11004
[2]
L. Brenton and R. Bruner, On recursive solutions of a unit fraction equation, J. Aust. Math. Soc. 57 (1994), 341-356. MR 95i:11024
[3]
L. Brenton and D. Drucker, On the number of solutions of $\sum^s_{j=1}(\frac{1}{x_j}) +\frac{1}{(x_1\dotsc x_s)}=1$, J. Number Theory 44 No. 2 (1993), 25-29. MR 94b:11029
[4]
-, Perfect graphs and complex surface singularities with perfect local fundamental group, Tôhoku Math. J. 41 (1989), 507-525. MR 91g:14025
[5]
L. Brenton and R. Hill, On the Diophantine equation $1=\sum (\frac{1}{n_i})+\frac{1}{(\prod n_i)}$ and a class of homologically trivial complex surface singularities, Pacific J. Math. 133 (1988), 41-67. MR 89d:32023
[6]
L. Brenton and M. K. Joo, On the system of congruences $\prod _{j\not=i}n_j\equiv 1\mod n_i$, The Fibonacci Quarterly 33 No. 3 (June-July 1995), 258-266. MR 96k:11039
[7]
Z. Cao, R. Liu and L. Zhang, On the equation $\sum^s_{j=1} (\frac{1}{x_j})+\frac{1}{(x_1\dotsc x_s)}=1$ and Znám's problem, J. Number Theory 27 No. 2 (1987), 206-211. MR 89d:11023
[8]
R. Guy, Unsolved Problems in Number Theory (2nd ed.), vol. I, Springer-Verlag, New York, 1994. MR 96e:11002
[9]
Z. Ke and Q. Sun, On the representation of $1$ by unit fractions, Sichuan Daxue Xuebao 1 (1964), 13-29.
[10]
P. Moree, Diophantine equations of Erdös-Moser type, Bull. Austral. Math. Soc. 53 (1996), 281-292. MR 97b:11048
[11]
L. Moser, On the Diophantine equation $1^n+2^n+3^n+\dotsb+ (m-1)^n=m^n$, Scripta Math. 19 (1953), 84-88. MR 14:950g
[12]
D. Mumford, The topology of normal singularities of an algebraic surface and a criterion for simplicity, Inst. Hautes Études Sci. Publ. Math. No. 9 (1961), 5-22. MR 27:3643


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Additional Information:

William Butske
Affiliation: Department of Mathematics, Wayne State University, 1150 FAB, Detroit, Michigan 48202
Address at time of publication: Department of Mathematics, Purdue University, West Lafayette, Indiana 47906
Email: butske@math.purdue.edu

Lynda M. Jaje
Affiliation: Department of Mathematics, Wayne State University, 1150 FAB, Detroit, Michigan 48202
Address at time of publication: EDS Office Centre, Mailstop 2061, 300 E. Big Beaver Road, Troy, Michigan 48083
Email: lynda.jaje@eds.com

Daniel R. Mayernik
Affiliation: Department of Mathematics, Wayne State University, 1150 FAB, Detroit, Michigan 48202
Email: mayernik@math.wayne.edu

DOI: 10.1090/S0025-5718-99-01088-1
PII: S 0025-5718(99)01088-1
Received by editor(s): June 19, 1996
Received by editor(s) in revised form: March 17, 1998
Posted: August 19, 1999
Copyright of article: Copyright 1999, American Mathematical Society


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