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Elementary Number Theory Problems. Part XIX Cover

Elementary Number Theory Problems. Part XIX

By: Karol Pąk  
Open Access
|Dec 2025

Abstract

In this paper, we present formal solutions to twelve problems selected from Wacław Sierpiński’s book 250 Problems in Elementary Number Theory. The selected problems are: 108, 112–114, 118–119, 127, 129, 130, and 132–134 formalized in the Mizar system.

DOI: https://doi.org/10.2478/forma-2025-0020 | Journal eISSN: 1898-9934 | Journal ISSN: 1426-2630
Language: English
Page range: 245 - 265
Submitted on: Dec 17, 2025
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Accepted on: Dec 21, 2025
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Published on: Dec 31, 2025
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2025 Karol Pąk, published by University of Białystok
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 License.