Specker, Ernst; Hungerbühler, Norbert; Wasem, Micha Polyfunctions over commutative rings. (English) Zbl 07773275 J. Algebra Appl. 23, No. 1, Article ID 2450014, 10 p. (2024). MSC: 13M10 11T06 PDFBibTeX XMLCite \textit{E. Specker} et al., J. Algebra Appl. 23, No. 1, Article ID 2450014, 10 p. (2024; Zbl 07773275) Full Text: DOI arXiv
Halbeisen, Lorenz; Hungerbühler, Norbert; Zargar, Arman Shamsi; Voznyy, Maksym A geometric approach to elliptic curves with torsion groups \(\mathbb{Z}/10\mathbb{Z}\), \(\mathbb{Z}/12\mathbb{Z}\), \(\mathbb{Z}/14\mathbb{Z}\), and \(\mathbb{Z}/16\mathbb{Z}\). (English) Zbl 1524.11118 Rad Hrvat. Akad. Znan. Umjet. 555, Mat. Znan. 27, 87-109 (2023). MSC: 11G05 14H52 PDFBibTeX XMLCite \textit{L. Halbeisen} et al., Rad Hrvat. Akad. Znan. Umjet., Mat. Znan. 555(27), 87--109 (2023; Zbl 1524.11118) Full Text: DOI arXiv
Halbeisen, Lorenz; Hungerbühler, Norbert; Shamsi Zargar, Arman A family of congruent number elliptic curves of rank three. (English) Zbl 07712934 Quaest. Math. 46, No. 6, 1131-1137 (2023). MSC: 11G05 14H52 PDFBibTeX XMLCite \textit{L. Halbeisen} et al., Quaest. Math. 46, No. 6, 1131--1137 (2023; Zbl 07712934) Full Text: DOI
Dutta, Sayan; Halbeisen, Lorenz; Hungerbühler, Norbert Properties of Hesse derivatives of cubic curves. arXiv:2309.05048 Preprint, arXiv:2309.05048 [math.AG] (2023). MSC: 11G05 37N99 BibTeX Cite \textit{S. Dutta} et al., ``Properties of Hesse derivatives of cubic curves'', Preprint, arXiv:2309.05048 [math.AG] (2023) Full Text: arXiv OA License
Halbeisen, Lorenz; Hungerbühler, Norbert; Schumacher, Salome; Yau, Guo Xian Sets of range uniqueness for multivariate polynomials and linear functions with rank \(k\). (English) Zbl 1511.26016 Linear Multilinear Algebra 70, No. 20, 5642-5660 (2022). Reviewer: Olga M. Katkova (Boston) MSC: 26C05 11C20 PDFBibTeX XMLCite \textit{L. Halbeisen} et al., Linear Multilinear Algebra 70, No. 20, 5642--5660 (2022; Zbl 1511.26016) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert Pairing Pythagorean pairs. (English) Zbl 1484.11104 J. Number Theory 233, 467-480 (2022). MSC: 11D72 11G05 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, J. Number Theory 233, 467--480 (2022; Zbl 1484.11104) Full Text: DOI arXiv
Busenhart, Chris; Halbeisen, Lorenz; Hungerbühler, Norbert; Riesen, Oliver On primitive solutions of the Diophantine equation \(x^2 + y^2 = M\). (English) Zbl 1501.11048 Open Math. 19, 863-868 (2021). Reviewer: Balasubramanian Sury (Bangalore) MSC: 11D45 11D09 PDFBibTeX XMLCite \textit{C. Busenhart} et al., Open Math. 19, 863--868 (2021; Zbl 1501.11048) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert; Schumacher, Salome Magic sets for polynomials of degree \(n\). (English) Zbl 1461.26007 Linear Algebra Appl. 609, 413-441 (2021). Reviewer: Olga M. Katkova (Boston) MSC: 26C05 11C20 30C10 PDFBibTeX XMLCite \textit{L. Halbeisen} et al., Linear Algebra Appl. 609, 413--441 (2021; Zbl 1461.26007) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert Heron triangles and their elliptic curves. (English) Zbl 1450.11053 J. Number Theory 213, 232-253 (2020). Reviewer: Noburo Ishii (Kyoto) MSC: 11G05 11D09 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, J. Number Theory 213, 232--253 (2020; Zbl 1450.11053) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert A geometric representation of integral solutions of \(x^2 + xy + y^2 = m^2\). (English) Zbl 1481.11028 Quaest. Math. 43, No. 3, 425-439 (2020). Reviewer: Volker Ziegler (Salzburg) MSC: 11D09 11H55 52C10 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, Quaest. Math. 43, No. 3, 425--439 (2020; Zbl 1481.11028) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert Congruent number elliptic curves related to integral solutions of \(m^2=n^2+nl+n^2\). (English) Zbl 1470.11152 J. Integer Seq. 22, No. 3, Article 19.3.1, 10 p. (2019). MSC: 11G05 11D09 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, J. Integer Seq. 22, No. 3, Article 19.3.1, 10 p. (2019; Zbl 1470.11152) Full Text: arXiv Link
Halbeisen, Lorenz; Hungerbühler, Norbert A theorem of Fermat on congruent number curves. (English) Zbl 1440.11094 Hardy-Ramanujan J. 41, 15-21 (2018). MSC: 11G05 11D25 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, Hardy-Ramanujan J. 41, 15--21 (2018; Zbl 1440.11094) Full Text: arXiv Link
Hungerbühler, Norbert; Specker, Ernst A generalization of the Smarandache function to several variables. (English) Zbl 1114.11003 Integers 6, Paper A23, 11 p. (2006). Reviewer: Stelian Mihalas (Timisoara) MSC: 11A25 11C08 PDFBibTeX XMLCite \textit{N. Hungerbühler} and \textit{E. Specker}, Integers 6, Paper A23, 11 p. (2006; Zbl 1114.11003) Full Text: EuDML Link
Halbeisen, Lorenz; Hungerbühler, Norbert Dual form of combinatorial problems and Laplace techniques. (English) Zbl 0970.05005 Fibonacci Q. 38, No. 5, 395-407 (2000). Reviewer: H.J.Tiersma (Diemen) MSC: 05A15 39A99 11B37 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, Fibonacci Q. 38, No. 5, 395--407 (2000; Zbl 0970.05005)
Halbeisen, Lorenz; Hungerbühler, Norbert An application of van der Waerden’s theorem in additive number theory. (English) Zbl 0962.11017 Integers 0, Paper A07, 5 p. (2000). Reviewer: Norbert Hegyvári (Budapest) MSC: 11B83 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, Integers 0, Paper A07, 5 p. (2000; Zbl 0962.11017) Full Text: EuDML
Halbeisen, L.; Hungerbühler, N. On generalized Carmichael numbers. (English) Zbl 1002.11006 Hardy-Ramanujan J. 22, 8-22 (1999). MSC: 11A51 11A07 11N25 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, Hardy-Ramanujan J. 22, 8--22 (1999; Zbl 1002.11006)
Halbeisen, Lorenz; Hungerbühler, Norbert; Läuchli, Hans Powers and polynomials in \(\mathbb{Z}_m\). (English) Zbl 1007.11002 Elem. Math. 54, No. 3, 118-129 (1999). Reviewer: O.Ninnemann (Berlin) MSC: 11A07 11C08 13M10 PDFBibTeX XMLCite \textit{L. Halbeisen} et al., Elem. Math. 54, No. 3, 118--129 (1999; Zbl 1007.11002) Full Text: DOI
Halbeisen, Lorenz; Hungerbühler, Norbert Optimal bounds for the length of rational Collatz cycles. (English) Zbl 0863.11015 Acta Arith. 78, No. 3, 227-239 (1997). Reviewer: N.Hungerbühler (Zürich) MSC: 11B83 11B37 26A18 39B12 PDFBibTeX XML Full Text: DOI EuDML
Halbeisen, Lorenz; Hungerbühler, Norbert The Josephus problem. (English) Zbl 0905.05002 J. Théor. Nombres Bordx. 9, No. 2, 303-318 (1997). MSC: 05A15 11B37 05A05 PDFBibTeX XMLCite \textit{L. Halbeisen} and \textit{N. Hungerbühler}, J. Théor. Nombres Bordx. 9, No. 2, 303--318 (1997; Zbl 0905.05002) Full Text: DOI Numdam EuDML EMIS
Hungerbühler, Norbert Proof of a conjecture of Lewis Carroll. (English) Zbl 0856.11015 Math. Mag. 69, No. 3, 182-184 (1996). Reviewer: E.J.Barbeau (Toronto) MSC: 11D09 PDFBibTeX XMLCite \textit{N. Hungerbühler}, Math. Mag. 69, No. 3, 182--184 (1996; Zbl 0856.11015) Full Text: DOI