Journals / Bitlis Eren Üniversitesi Fen Bilimleri Dergisi / 2026 / Volume: 15 Issue: 2

On Isolated Gaps of Non-perfect Arf Numerical Semigroups

Meral Süer(BATMAN ÜNİVERSİTESİ)0000-0002-5512-4305
Pages
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Publication Date
2026-06-30
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These findings shed new light on the relationship between perfect and non-perfect Arf numerical semigroups and clarify the role of isolated gaps in the transition between these two classes.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study examines the structure of non-perfect Arf numerical semigroups and explores the characteristics of their isolated gaps.
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Key Findings & Data:The analysis focuses on the structural relationship between the elements of Arf numerical semigroups and their gap sets.
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Conclusion & Impact:These findings shed new light on the relationship between perfect and non-perfect Arf numerical semigroups and clarify the role of isolated gaps in the transition between these two classes.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Arf numerical semigroup · Isolated gap · Non-perfect Arf numerical semigroup

Abstract

This study examines the structure of non-perfect Arf numerical semigroups and explores the characteristics of their isolated gaps. The analysis focuses on the structural relationship between the elements of Arf numerical semigroups and their gap sets. For non-perfect Arf numerical semigroups, the position and behavior of isolated gaps, together with their connection to the Frobenius number, are characterized. It is shown that the union of an Arf numerical semigroup with its set of isolated gaps forms a perfect Arf numerical semigroup. Moreover, when certain subsets of isolated gaps are considered, the resulting semigroups preserve their non-perfect nature. These findings shed new light on the relationship between perfect and non-perfect Arf numerical semigroups and clarify the role of isolated gaps in the transition between these two classes.

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Cite This Article

Süer, M., Ertuğrul, R. (2026). On Isolated Gaps of Non-perfect Arf Numerical Semigroups. Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, Volume: 15 Issue: 2. https://doi.org/10.17798/bitlisfen.1797928

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References (11)

  1. J.C. Rosales, P.A. García-Sánchez, Numerical Semigroups. New York, NY, USA: Springer, 2009.
  2. M.A. Moreno-Frais, and J.C. Rosales, “Perfect numerical semigroups,” Turkish Journal of Mathematics, vol. 43, no. 3, pp. 1742–1754, 2019.
  3. H. J. Smith, “Quotients of perfect numerical semigroups,” Rocky Mountain J. Math. vol. 5, no. 3, pp. 1075-1077, June 2021.
  4. C. Arf, “Une interpretation algebrique de la suite ordres de multiplicite d'une branche algebrique,” Proc. London Math. Soc., vol. 20, pp. 256-287, 1949.
  5. A. Compillo, J.I. Farran, and C. Munuera, “On the parameters of algebraic geometry codes related to Arf semigroups,” IEEE Trans. Inform. Theory, vol. 46, no.7, pp. 2634–2638, 2000.
  6. A. Abdallah, M. D'Anna, and P. A. García-Sánchez, Numerical Semigroups and Applications. Second edition, RSME Springer Series, 3. Springer, Cham, 2020.
  7. M.A. Moreno-Frais, and J.C. Rosales, “The covariety of perfect numerical semigroups with fixed Frobenius number,” arXiv:2305.14967, May, 24, 2023, [Online]. Available: https://arxiv.org/pdf/2305.14967
  8. H. J. Smith, “On isolated gaps in numerical semigroups,” Turkish Journal of Mathematics, vol. 46, no. 1: 123-129, 2022.
  9. S. İlhan, “On Some Perfect Arf Numerical Semigroups,” in Matematik Çalışmaları, A. Kazan, Ed., Afyonkarahisar, Türkiye: Yaz Yayınları, 2024, pp. 1-23.
  10. N. Shubh, N. Singh, and K.R. Ranjan, “On isolated gaps of numerical semigroups of embedding dimension two,” arXiv, June, 14, 2024, [Online]. Available: https://arxiv.org/pdf/2406.09848
  11. J.C. Rosales, P.A. Garcia-Sánchez, J.I. Garcia-Garcia, and M.B. Branco, “Arf numerical semigroups,” J. Algebra, vol. 276, pp. 3–12, 2004.