Research Article
BibTex RIS Cite

Sayısal Yarı Gruplara İlişkin Kombinasyonel İçgörüler: Kale Yerleşimleri ve Lah Sayıları

Year 2026, Volume: 21 Issue: 1 , 35 - 45 , 30.03.2026
https://doi.org/10.55525/tjst.1724097
https://izlik.org/JA93ER59BN

Abstract

Bu makale, Young diyagramları, kale polinomları ve Lah sayıları merceğinden sayısal yarıgruplar ve sayma kombinasyonları arasındaki etkileşimi araştırır. Belirli bir sayısal yarıgrup S için, S’nin boşluk kümesinden oluşturulmuş bir Young diyagramı ilişkilendiririz. Daha sonra bu diyagrama karşılık gelen kale polinomunu hesaplar ve katsayılarını analiz ederiz. Bu katsayıların, sıralı bölümlemeleri sayan Lah sayılarıyla güçlü bir bağlantı gösterdiği gözlemlenir. Yaklaşımımız, sayısal yarıgrup boşluklarının yeni bir kombinatoryal yorumunu sunar ve cebirsel ve sayma kavramları arasında yeni yapısal bağlantılar ortaya koyar.

Project Number

No

References

  • Rosales JC, García-Sánchez PA. Numerical Semigroups. New York, NY, USA: Springer, 2009.
  • Kirfel C, Pellikaan R. The minimum distance of codes in an array coming from telescopic semigroups. IEEE Trans Inf Theory 1995; 41(6): 1720-1732.
  • Keith WJ, Nath R. Partitions with prescribed hooksets. arXiv preprint 2010; arXiv:1011.1945
  • Constantin H, Houston-Edwards B, Kaplan N. Numerical sets, core partitions, and integer points in polytopes. Combinatorial and Additive Number Theory II. Ed. Nathanson MB. New York: Springer International Publishing, 2017; 99-127.
  • Süer M, Yeşil M. Symmetric and pseudo-symmetric numerical semigroups via Young diagrams and their semigroup rings. J Korean Math Soc 2021; 58(6):1367-1383.
  • Riordan J. An Introduction to Combinatorial Analysis. New York, NY, USA: Wiley Press, 1958.
  • Guo BN, Qi F. Six proofs for an identity of the Lah numbers. Online Journal of Analytic Combinatorics Press 2015; 10: 5 pages.
  • Haglund J. q-Rook polynomials and matrices over finite fields. Adv Appl Math 1998; 20(4): 450–487.
  • Josuat-Vergès M. Rook placements in Young diagrams and permutation enumeration. Advances in Applied Mathematics 2011; 47(1): 1-22.
  • Süer M, Sezgin MŞ. The rook polynomials of almost symmetric Arf numerical semigroups. Communications in Algebra 2025; 53(10): 4063–4080.
  • Süer M, Yeşil M. Special subdiagrams of Young diagrams and numerical semigroups. Turkish Journal of Mathematics 2024; 48(2): 346-359.
  • Tankosic AZ. The (l, r)-Lah numbers. Journal of Integer Sequences 2023; 26(2): 16 pages.
  • Tutaş N, Karakaş Hİ, Gümüşbaş N. Young tableaux and Arf partitions. Turkish Journal of Mathematics 2019; 43(1): 448-459.
  • Tankosic AZ. The (l, r)-Lah numbers. Journal of Integer Sequences 2023; 26(2): 16 pages.
  • Petkovšek M, Pisanski T. Combinatorial interpretation of unsigned Stirling and Lah numbers. Pi Mu Epsilon J. 2007; 12: 417–424.

Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers

Year 2026, Volume: 21 Issue: 1 , 35 - 45 , 30.03.2026
https://doi.org/10.55525/tjst.1724097
https://izlik.org/JA93ER59BN

Abstract

This paper investigates the interplay between numerical semigroups and enumerative combinatorics through the lens of Young diagrams, rook polynomials, and the Lah numbers. For a given numerical semigroup S, we associate a Young diagram constructed from the gap set of S. We then compute the rook polynomial corresponding to this diagram and analyze its coefficients. It is observed that these coefficients exhibit a strong connection with the Lah numbers, which count ordered partitions. Our approach introduces a new combinatorial interpretation of numerical semigroup gaps and reveals novel structural links between algebraic and enumerative concepts.

Ethical Statement

Ethical declaration is not required

Supporting Institution

No

Project Number

No

Thanks

No

References

  • Rosales JC, García-Sánchez PA. Numerical Semigroups. New York, NY, USA: Springer, 2009.
  • Kirfel C, Pellikaan R. The minimum distance of codes in an array coming from telescopic semigroups. IEEE Trans Inf Theory 1995; 41(6): 1720-1732.
  • Keith WJ, Nath R. Partitions with prescribed hooksets. arXiv preprint 2010; arXiv:1011.1945
  • Constantin H, Houston-Edwards B, Kaplan N. Numerical sets, core partitions, and integer points in polytopes. Combinatorial and Additive Number Theory II. Ed. Nathanson MB. New York: Springer International Publishing, 2017; 99-127.
  • Süer M, Yeşil M. Symmetric and pseudo-symmetric numerical semigroups via Young diagrams and their semigroup rings. J Korean Math Soc 2021; 58(6):1367-1383.
  • Riordan J. An Introduction to Combinatorial Analysis. New York, NY, USA: Wiley Press, 1958.
  • Guo BN, Qi F. Six proofs for an identity of the Lah numbers. Online Journal of Analytic Combinatorics Press 2015; 10: 5 pages.
  • Haglund J. q-Rook polynomials and matrices over finite fields. Adv Appl Math 1998; 20(4): 450–487.
  • Josuat-Vergès M. Rook placements in Young diagrams and permutation enumeration. Advances in Applied Mathematics 2011; 47(1): 1-22.
  • Süer M, Sezgin MŞ. The rook polynomials of almost symmetric Arf numerical semigroups. Communications in Algebra 2025; 53(10): 4063–4080.
  • Süer M, Yeşil M. Special subdiagrams of Young diagrams and numerical semigroups. Turkish Journal of Mathematics 2024; 48(2): 346-359.
  • Tankosic AZ. The (l, r)-Lah numbers. Journal of Integer Sequences 2023; 26(2): 16 pages.
  • Tutaş N, Karakaş Hİ, Gümüşbaş N. Young tableaux and Arf partitions. Turkish Journal of Mathematics 2019; 43(1): 448-459.
  • Tankosic AZ. The (l, r)-Lah numbers. Journal of Integer Sequences 2023; 26(2): 16 pages.
  • Petkovšek M, Pisanski T. Combinatorial interpretation of unsigned Stirling and Lah numbers. Pi Mu Epsilon J. 2007; 12: 417–424.
There are 15 citations in total.

Details

Primary Language English
Subjects Algebra and Number Theory, Combinatorics and Discrete Mathematics (Excl. Physical Combinatorics)
Journal Section Research Article
Authors

Meral Süer 0000-0002-5512-4305

Project Number No
Submission Date June 20, 2025
Acceptance Date September 24, 2025
Early Pub Date December 16, 2025
Publication Date March 30, 2026
DOI https://doi.org/10.55525/tjst.1724097
IZ https://izlik.org/JA93ER59BN
Published in Issue Year 2026 Volume: 21 Issue: 1

Cite

APA Süer, M. (2026). Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers. Turkish Journal of Science and Technology, 21(1), 35-45. https://doi.org/10.55525/tjst.1724097
AMA 1.Süer M. Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers. TJST. 2026;21(1):35-45. doi:10.55525/tjst.1724097
Chicago Süer, Meral. 2026. “Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers”. Turkish Journal of Science and Technology 21 (1): 35-45. https://doi.org/10.55525/tjst.1724097.
EndNote Süer M (March 1, 2026) Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers. Turkish Journal of Science and Technology 21 1 35–45.
IEEE [1]M. Süer, “Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers”, TJST, vol. 21, no. 1, pp. 35–45, Mar. 2026, doi: 10.55525/tjst.1724097.
ISNAD Süer, Meral. “Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers”. Turkish Journal of Science and Technology 21/1 (March 1, 2026): 35-45. https://doi.org/10.55525/tjst.1724097.
JAMA 1.Süer M. Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers. TJST. 2026;21:35–45.
MLA Süer, Meral. “Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers”. Turkish Journal of Science and Technology, vol. 21, no. 1, Mar. 2026, pp. 35-45, doi:10.55525/tjst.1724097.
Vancouver 1.Meral Süer. Combinatorial Insights into Numerical Semigroups: Rook Placements and Lah Numbers. TJST. 2026 Mar. 1;21(1):35-4. doi:10.55525/tjst.1724097