Research Article

The Neighbor Graph of Self-Dual Codes Over Finite Fields

Volume: 17 Number: 2 December 30, 2025

The Neighbor Graph of Self-Dual Codes Over Finite Fields

Abstract

We extend the neighbor construction of binary self-dual codes to codes over arbitrary finite fields. We show that the neighbor graph of self-dual codes over the fields of even characteristic is a connected, regular graph and we count vertices, edges and $s$-neighbors in the graph. When the length is a multiple of $4,$ we define the neighbor graph of Type II codes over the field of order $4$ and count the vertices and the edges in the graph. We describe two graphs for self-dual codes over the fields of odd characteristic according to the existence of the subcode generated by the all one-vector and we determine the parameters of the neighbor graph of ternary self-dual codes.

Keywords

References

  1. Assmus, E.F., Key, J.D., Designs and Their Codes, Cambridge Tracts in Mathematics, Cambridge University Press, 1992.
  2. Conway, J.H., Sloane, N.J.A., A new upper bound on the minimal distance of self-dual codes, IEEE Trans. Inform. Theory, 6(6)(1990), 1319–1333.
  3. Conway, J.H., Sloane, N.J.A., Sphere Packings, Lattices, and Groups, 3rd Edition, Grundlehren der MathematischenWissenschaften, Springer, New York, NY, 1999.
  4. Dougherty, S.T., Algebraic Coding Theory Over Finite Commutative Rings, SpringerBriefs in Mathematics, Springer, Cham, 2017.
  5. Dougherty, S.T., The neighbor graph of binary self-dual codes, Des. Codes, Cryptog. 90(2)(2022), 409–425.
  6. Dougherty, S.T., Shadow codes and their weight enumerators, IEEE Transactions on Information Theory, 41(3)(1995), 762–768.
  7. Dougherty, S.T., Gildea, J., Korban, A., Kaya A., New extremal self-dual binary codes of length 68 via composite construction, F2 + uF2 lifts, extensions and neighbors,Int. J. Inf. Coding Theory, 5(3-4)(2020), 211–226.
  8. Dougherty, S.T., Harada, M., Sol´e, P., Shadow codes over Z4,, Finite Fields App., 7(2001), 507–529.

Details

Primary Language

English

Subjects

Combinatorics and Discrete Mathematics (Excl. Physical Combinatorics), Applied Mathematics (Other)

Journal Section

Research Article

Publication Date

December 30, 2025

Submission Date

April 22, 2025

Acceptance Date

July 28, 2025

Published in Issue

Year 2025 Volume: 17 Number: 2

APA
Saltürk, E. (2025). The Neighbor Graph of Self-Dual Codes Over Finite Fields. Turkish Journal of Mathematics and Computer Science, 17(2), 450-471. https://doi.org/10.47000/tjmcs.1681863
AMA
1.Saltürk E. The Neighbor Graph of Self-Dual Codes Over Finite Fields. TJMCS. 2025;17(2):450-471. doi:10.47000/tjmcs.1681863
Chicago
Saltürk, Esengül. 2025. “The Neighbor Graph of Self-Dual Codes Over Finite Fields”. Turkish Journal of Mathematics and Computer Science 17 (2): 450-71. https://doi.org/10.47000/tjmcs.1681863.
EndNote
Saltürk E (December 1, 2025) The Neighbor Graph of Self-Dual Codes Over Finite Fields. Turkish Journal of Mathematics and Computer Science 17 2 450–471.
IEEE
[1]E. Saltürk, “The Neighbor Graph of Self-Dual Codes Over Finite Fields”, TJMCS, vol. 17, no. 2, pp. 450–471, Dec. 2025, doi: 10.47000/tjmcs.1681863.
ISNAD
Saltürk, Esengül. “The Neighbor Graph of Self-Dual Codes Over Finite Fields”. Turkish Journal of Mathematics and Computer Science 17/2 (December 1, 2025): 450-471. https://doi.org/10.47000/tjmcs.1681863.
JAMA
1.Saltürk E. The Neighbor Graph of Self-Dual Codes Over Finite Fields. TJMCS. 2025;17:450–471.
MLA
Saltürk, Esengül. “The Neighbor Graph of Self-Dual Codes Over Finite Fields”. Turkish Journal of Mathematics and Computer Science, vol. 17, no. 2, Dec. 2025, pp. 450-71, doi:10.47000/tjmcs.1681863.
Vancouver
1.Esengül Saltürk. The Neighbor Graph of Self-Dual Codes Over Finite Fields. TJMCS. 2025 Dec. 1;17(2):450-71. doi:10.47000/tjmcs.1681863

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