All positive integer solutions of the Diophantine equation 1/w+1/x+1/y+1/z=1/2

Authors

  • Suton Tadee Department of Mathematics, Faculty of Science and Technology, Thepsatri Rajabhat University
  • Somprasong Kaewsod
  • Sutthiphat Lawantha
  • Aticha Yiamras

Keywords:

Diophantine Equation, Positive Integer Solution

Abstract

In 2018, Bai studied and found all positive integer solutions of the Diophantine equation equation, where equation and equation are positive integers such that equation. However, it was later found that the solutions were incomplete. In this research, we proceeded to find all positive integer solutions equation of the equation and there was a total of 108 solutions.

References

Rabago, J.F.T. and Tagle, R.P. (2013). On the area and volume of a certain regular solid and the Diophantine equation 1/2 = 1/x + 1/y + 1/z. Notes on Number Theory and Discrete Mathematics, 19(3), 28-32. https://nntdm.net/papers/nntdm-19/NNTDM-19-3-28-32.pdf

Sándor, J. (2013). A note on a Diophantine equation. Notes on Number Theory and Discrete Mathematics, 19(4), 1-3. https://www.nntdm.net/papers/nntdm-19/NNTDM-19-4-01-03.pdf

Atri, R. (2022). On the Diophantine equations 1/x + 1/y + 1/z = 1/4 and 1/x + 1/y + 1/z + 1/t = 1/4. International Journal of Science and Research, 11(1), 573-574. https://www.ijsr.net/archive/v11i1/SR22109130000.pdf

Tadee, S. and Poopra, S. (2023). On the Diophantine equation 1/x + 1/y + 1/z = 1/n. International Journal of Mathematics and Computer Science, 18(2), 173-177. https://www.researchgate.net/publication/368691259_On_the_Diophantine_Equation_1x1y1z1n

Bai, T. (2018). On 1/w + 1/x + 1/y + 1/z = 1/2 and some of its generalizations. Journal of Inequalities and Applications, 2018, 1-13. https://journalofinequalitiesandapplications.springeropen.com/counter/pdf/10.1186/s13660-018-1782-z.pdf

Wongsanurak, W. and Duangdai, E. (2023). The natural number solutions of the Diophantine equation 1/w + 1/x + 1/y + 1/z = u/(u+1). Academic Journal of Science and Applied Science, 2, 91-98. (in Thai) https://ph03.tci-thaijo.org/index.php/ajsas/article/view/3574/2723

Tadee, S. (2025). On the Diophantine equation 1/w + 1/x + 1/y + 1/z = u/(u+1). Progress in Applied Science and Technology,15(1),1-5 https://doi.org/10.60101/past.2025.257129

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Published

2025-10-10

How to Cite

Tadee, S., Kaewsod, S., Lawantha, S., & Yiamras, A. (2025). All positive integer solutions of the Diophantine equation 1/w+1/x+1/y+1/z=1/2. Academic Journal of Science and Applied Science, 9(18), e3795. Retrieved from https://ph03.tci-thaijo.org/index.php/ajsas/article/view/3795