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Sierpi\u0144ski\u2019s book \u201c250 Problems in Elementary Number Theory\u201d [10].<\/jats:p>","DOI":"10.2478\/forma-2023-0021","type":"journal-article","created":{"date-parts":[[2024,1,1]],"date-time":"2024-01-01T13:42:34Z","timestamp":1704116554000},"page":"229-275","source":"Crossref","is-referenced-by-count":2,"title":["Elementary Number Theory Problems. Part XI"],"prefix":"10.2478","volume":"31","author":[{"given":"Adam","family":"Naumowicz","sequence":"first","affiliation":[{"name":"Faculty of Computer Science , University of Bia\u0142ystok , Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2023,12,31]]},"reference":[{"key":"2026042801384959354_j_forma-2023-0021_ref_001","doi-asserted-by":"crossref","unstructured":"Grzegorz Bancerek, Czes\u0142aw Byli\u0144ski, Adam Grabowski, Artur Korni\u0142owicz, Roman Matuszewski, Adam Naumowicz, Karol P\u0105k, and Josef Urban. Mizar: State-of-the-art and beyond. In Manfred Kerber, Jacques Carette, Cezary Kaliszyk, Florian Rabe, and Volker Sorge, editors, Intelligent Computer Mathematics, volume 9150 of Lecture Notes in Computer Science, pages 261\u2013279. Springer International Publishing, 2015. ISBN 978-3-319-20614-1. doi:10.1007\/978-3-319-20615-8_17.","DOI":"10.1007\/978-3-319-20615-8_17"},{"key":"2026042801384959354_j_forma-2023-0021_ref_002","doi-asserted-by":"crossref","unstructured":"Grzegorz Bancerek, Czes\u0142aw Byli\u0144ski, Adam Grabowski, Artur Korni\u0142owicz, Roman Matuszewski, Adam Naumowicz, and Karol P\u0105k. The role of the Mizar Mathematical Library for interactive proof development in Mizar. Journal of Automated Reasoning, 61(1):9\u201332, 2018. doi:10.1007\/s10817-017-9440-6.","DOI":"10.1007\/s10817-017-9440-6"},{"key":"2026042801384959354_j_forma-2023-0021_ref_003","unstructured":"D. R. Kaprekar. Multidigital numbers. 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Miller, editors, Intelligent Computer Mathematics \u2013 13th International Conference, CICM 2020, Bertinoro, Italy, July 26\u201331, 2020, Proceedings, volume 12236 of Lecture Notes in Computer Science, pages 303\u2013308. Springer, 2020. doi:10.1007\/978-3-030-53518-6_22.","DOI":"10.1007\/978-3-030-53518-6_22"},{"key":"2026042801384959354_j_forma-2023-0021_ref_007","doi-asserted-by":"crossref","unstructured":"Adam Naumowicz. Elementary number theory problems. Part I. Formalized Mathematics, 28(1):115\u2013120, 2020. doi:10.2478\/forma-2020-0010.","DOI":"10.2478\/forma-2020-0010"},{"key":"2026042801384959354_j_forma-2023-0021_ref_008","doi-asserted-by":"crossref","unstructured":"Adam Naumowicz. On the representation of natural numbers in positional numeral systems. Formalized Mathematics, 14(4):221\u2013223, 2006. doi:10.2478\/v10037-006-0025-9.","DOI":"10.2478\/v10037-006-0025-9"},{"key":"2026042801384959354_j_forma-2023-0021_ref_009","unstructured":"Wac\u0142aw Sierpi\u0144ski. Elementary Theory of Numbers. PWN, Warsaw, 1964."},{"key":"2026042801384959354_j_forma-2023-0021_ref_010","unstructured":"Wac\u0142aw Sierpi\u0144ski. 250 Problems in Elementary Number Theory. Elsevier, 1970."}],"container-title":["Formalized Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/reference-global.com\/pdf\/10.2478\/forma-2023-0021","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T13:01:36Z","timestamp":1777381296000},"score":1,"resource":{"primary":{"URL":"https:\/\/reference-global.com\/article\/10.2478\/forma-2023-0021"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,9,1]]},"references-count":10,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2023,12,31]]},"published-print":{"date-parts":[[2023,9,1]]}},"alternative-id":["10.2478\/forma-2023-0021"],"URL":"https:\/\/doi.org\/10.2478\/forma-2023-0021","relation":{},"ISSN":["1898-9934"],"issn-type":[{"value":"1898-9934","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,9,1]]}}}