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Ebrahim Ghorbani

Associate Professor

Update: 2026-06-08

Ebrahim Ghorbani

Mathematics / Pure Mathematics

Journal Paper

  1. "The vector space generated by permutations of a trade or a design"
    Ebrahim Ghorbani, S. Kamali, G.B. Khosrovshahi
    JOURNAL OF COMBINATORIAL THEORY SERIES A, Vol. 210, 2025
  2. "A Hall type theorem with algorithmic consequences in planar graph"
    Ebrahim Ghorbani, Hossein Jowhari
    DISCRETE MATHEMATICS, Vol. 347, pp.1-7, 2024
  3. "A Discrete Variation of the Littlewood-Offord Problem"
    Hossein Esmailian, Ebrahim Ghorbani
    ELECTRONIC JOURNAL OF COMBINATORICS, Vol. 31, 2024
  4. "Complete signed graphs with largest maximum or smallest minimum eigenvalue"
    Ebrahim Ghorbani, Arezoo Majidi yeldagermani
    DISCRETE MATHEMATICS, Vol. 347, 2024
  5. "Graphs of Degree at Least 3 with Minimum Algebraic Connectivity"
    Maryam Abdi, Ebrahim Ghorbani
    SIAM JOURNAL ON DISCRETE MATHEMATICS, Vol. 38, pp.2447-2467, 2024
  6. "Minimum algebraic connectivity and maximum diameter: Aldous-Fill and Guiduli-Mohar conjectures"
    abdi maryam, Ebrahim Ghorbani
    JOURNAL OF COMBINATORIAL THEORY SERIES B, Vol. 167, pp.164-188, 2024
  7. "A Hall-type theorem with algorithmic consequences in planar graphs"
    Ebrahim Ghorbani, Hossein Jowhari
    DISCRETE MATHEMATICS, Vol. 347, 2024
  8. "Gap sets for the spectra of regular graphs with minimum spectral gap"
    Maryam Abdi, Ebrahim Ghorbani
    DISCRETE MATHEMATICS, Vol. 346, pp.1-19, 2023
  9. ""
    Hossein Esmailian, Ebrahim Ghorbani
    Vol. 12, pp.81-89, 2022
  10. "Spectral classes of strongly-regular and distance-regular graphs"
    Ebrahim Ghorbani, Masoumeh Koohestani
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 641, pp.182-199, 2022
  11. "Quartic graphs with minimum spectral gap"
    Maryam Abdi, Ebrahim Ghorbani
    JOURNAL OF GRAPH THEORY, pp.1-29, 2022
  12. "Regular graphs with minimum spectral gap"
    Maryam Abdi, Ebrahim Ghorbani, W. Imrich
    EUROPEAN JOURNAL OF COMBINATORICS, Vol. 95, pp.1-18, 2021
  13. "Maximal graphs with respect to rank"
    Hossein Esmailian, Ebrahim Ghorbani, S. Hossein Ghorban, G.B. Khosrovshahi
    DISCRETE MATHEMATICS, Vol. 344, pp.1-11, 2021
  14. "Hamiltonicity of a Coprime Graph"
    Mohammad Hossein Bani Mostafa Arab, Ebrahim Ghorbani
    GRAPHS AND COMBINATORICS, pp.1-9, 2021
  15. "Signed graphs with maximal index"
    Ebrahim Ghorbani, Arezoo Majidi yeldagermani
    DISCRETE MATHEMATICS, Vol. 344, pp.1-8, 2021
  16. "On sign-symmetric signed graphs"
    Ebrahim Ghorbani, Willem H. Haemers, Hamid Reza Maimani, Leila Parsaei Majd
    ARS Mathematica Contemporanea, Vol. 19, pp.83-93, 2020
  17. "Maximum order of graphs with a given corank"
    Hossein Esmailian, Ebrahim Ghorbani
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 588, pp.122-133, 2020
  18. "Some algebraic properties of Sierpiski-type graphs"
    Mohammad Farrokhi Derakhshandeh Ghouchan, Ebrahim Ghorbani, Hamid Reza Maimani, Farhad Rahimi Mahid
    ARS Mathematica Contemporanea, Vol. 19, pp.1-16, 2020
  19. "On the Volumes and Affine Types of Trades"
    Ebrahim Ghorbani, Sara Kamali, Gholamreza B. Khosrovshahi, Denis Krotov
    ELECTRONIC JOURNAL OF COMBINATORICS, Vol. 27, 2020
  20. "Eigenvalue-free interval for threshold graphs"
    Ebrahim Ghorbani
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 583, pp.300-305, 2019
  21. "Vertex types in threshold and chain graphs"
    Milica Andelic, Ebrahim Ghorbani, Simic Slobodan
    DISCRETE APPLIED MATHEMATICS, pp.1-10, 2019
  22. "Cographs: Eigenvalues and Dilworth number"
    Ebrahim Ghorbani
    DISCRETE MATHEMATICS, pp.1-7, 2018
  23. "Spectral properties of cographs and p5-free graphs"
    Ebrahim Ghorbani
    LINEAR and MULTILINEAR ALGEBRA, pp.1-10, 2018
  24. "On eigenvalues of Seidel matrices and Haemers conjecture"
    Ebrahim Ghorbani
    DESIGNS CODES AND CRYPTOGRAPHY, Vol. 84, pp.189-195, 2017
  25. "Integral trees with given nullity"
    Ebrahim Ghorbani, A. Mohammadian, B. Tayfeh-Rezaie
    DISCRETE MATHEMATICS, Vol. 339, pp.157-164, 2016
  26. "Nontrivial nuciferous graphs exist"
    Ebrahim Ghorbani
    ARS Mathematica Contemporanea, Vol. 11, pp.391-395, 2016
  27. "Proof of a conjecture on plateaux phenomenon of graph Laplacian eigenvalues"
    Ebrahim Ghorbani
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 506, pp.274-278, 2016
  28. "On order and rank of graphs"
    Ebrahim Ghorbani, Ali Mohammadian, Behruz Tayfeh-Rezaie
    COMBINATORICA, Vol. 35, pp.655-668, 2015
  29. "Inverses of triangular matrices and bipartite graphs"
    R.B Bapat, Ebrahim Ghorbani
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 447, pp.68-73, 2014
  30. "Maximum Order of Triangle-Free Graphs with a Given Rank"
    Ebrahim Ghorbani, A Mohammadian, B Tayfeh Rezaie
    JOURNAL OF GRAPH THEORY, Vol. 79, pp.145-158, 2014
  31. "Spanning trees and even integer eigenvalues of graphs"
    Ebrahim Ghorbani
    DISCRETE MATHEMATICS, Vol. 324, pp.62-67, 2014
  32. "On the eigenvalues of certain Cayley graphs and arrangement graphs"
    B Chen, Ebrahim Ghorbani, K Wong
    LINEAR ALGEBRA AND ITS APPLICATIONS, Vol. 444, pp.246-253, 2014
  33. "On optimality of designs with three distinct eigenvalues"
    M Faghihi, Ebrahim Ghorbani, G Khosrovshahi, S Tat
    ELECTRONIC JOURNAL OF COMBINATORICS, Vol. 20, pp.1-12, 2013
  34. "Graphs With Few Matching Roots"
    Ebrahim Ghorbani
    GRAPHS AND COMBINATORICS, 2013
  35. "Cyclic decomposition of k-permutations and eigenvalues of the arrangement graphs"
    B Chen, Ebrahim Ghorbani, K Wong
    ELECTRONIC JOURNAL OF COMBINATORICS, Vol. 20, pp.1-18, 2013
  36. "Intersection Matrices Revisited"
    Ebrahim Ghorbani
    JOURNAL OF COMBINATORIAL DESIGNS, 2012
  37. "Nowhere-zero eigenvectors of graphs"
    Ebrahim Ghorbani
    LINEAR and MULTILINEAR ALGEBRA, 2012
  38. "Simple Signed Steiner Triple Systems"
    Ebrahim Ghorbani
    JOURNAL OF COMBINATORIAL DESIGNS, 2012
  39. "Bipartite graphs with five eigenvalues and pseudo designs"
    Ebrahim Ghorbani
    JOURNAL OF ALGEBRAIC COMBINATORICS, 2012
  40. "Maximum order of trees and bipartite graphs with a given rank"
    Ebrahim Ghorbani
    DISCRETE MATHEMATICS, pp.3498-3501, 2012

Conference Paper

  1. ""
    Ebrahim Ghorbani
    Signed Steiner Triple Systems,
  2. "COLLOQUIUM ON COMBINATORICS"
    Ebrahim Ghorbani
    Maximum diameter and minimum algebraic connectivity, 2023
  3. "The 11th Seminar on Linear Algebra and its Applications"
    Ebrahim Ghorbani
    Graph characterization by gap interval in their spectrum, 2022
  4. "The 11th Seminar on Linear Algebra and its Applications"
    Ebrahim Ghorbani
    Graph characterization by gap interval in the spectrum, 2022
  5. "The fourth IPM biennial conference on combinatorics and computing"
    Masoumeh Koohestani, Ebrahim Ghorbani
    Spectral Classes of Distance-Regular Graphs, 2021
  6. "International Conference on Graph Connections"
    Ebrahim Ghorbani
    Regular graphs with minimum spectral gap, 2020
  7. "International Conference on Graph Connections"
    Ebrahim Ghorbani
    Regular graph with minimum spectral gap, 2020
  8. "8th International Eurasian Conference on Mathematical Sciences and Applications"
    Ebrahim Ghorbani
    On the Spectrum of Threshold Graphs, 2019
  9. "Third IPM biennial conference on combinatorics and computing (IPMCCC 2019)"
    Hossein Esmailian, Ebrahim Ghorbani
    Maximum order of graphs with a given corank, 2019
  10. "Third IPM biennial conference on combinatorics and computing (IPMCCC 2019)"
    Maryam Abdi, Ebrahim Ghorbani, Wilfred Imrich
    The Structure of Quartic Graphs with Minimal Spectral Gap, 2019
  11. "International Congress of Mathematicians ICM 2018"
    Ebrahim Ghorbani, Sara Kamali
    On prime labeling of graphs, 2018
  12. "The First Mathematics and Statistics National Congress"
    Ebrahim Ghorbani, Arezoo Majidi yeldagermani
    كران هايي براي عدد رنگي پويا گراف ها, 2018
  13. "10th Conference on Graph Theory and Algebraic Combinatorics"
    Ebrahim Ghorbani
    Cograph Eigenvalues and More, 2018
  14. "10th Graph Theory and Algebraic Combinatorics conference"
    Ebrahim Ghorbani
    Cographs Eigenvalues and More, 2018
  15. "International Conference on Linear Algebra and its Applications"
    Ebrahim Ghorbani
    Eigenvector of chain graphs, 2017
  16. "International Conference on Linear Algebra and its Applications"
    Ebrahim Ghorbani
    Eigenvectors of Chain Graphs, 2017
  17. "Second Macedonian Workshop of Graph Theory and its Application"
    Ebrahim Ghorbani
    Spanning trees and eigenvalues of graphs, 2017
  18. "The Mathematics of Ji Matou ek"
    Ebrahim Ghorbani
    On Nuciferous graphs, 2016
  19. "7th European Congress of Mathematics"
    Ebrahim Ghorbani
    On eigenvalues of cographs, 2016
  20. "46th Annual Iranian Mathematics Conference"
    Ebrahim Ghorbani
    Steiner triple systems with forbiden configurations, 2015
  21. "Lebanese International Conference on Mathematics and Applications"
    Ebrahim Ghorbani
    Integral tree, 2015
  22. "The Second International Conference on Mathematics and Statistics (AUS-ICMS 2015)"
    Ebrahim Ghorbani
    Spectral Characterization of Cographs, 2015
  23. "International conference on Advances in Mathematical Sciences and Applications"
    Ebrahim Ghorbani
    On Seidel energy of graphs, 2014
  24. "International Conference on Linear Algebra its Applications"
    Ebrahim Ghorbani
    Rank and order of graphs, 2014
  25. "International Congress of Mathematicians ICM 2014"
    Ebrahim Ghorbani
    Applications of KKT method in combinatorial problems, 2014
  26. "The first IPM-Isfahan workshop on Combinatorics"
    Ebrahim Ghorbani
    Arrangement graphs, 2014
  27. "ICTP-IPM Workshop and Conference in Combinatorics and Graph Theory"
    Ebrahim Ghorbani
    Maximum order of triangle-free graphs with a given rank, 2012
  28. ""
    Ebrahim Ghorbani
    Seidel energy of graphs and Haemers conjecture, 2011
  29. ""
    Ebrahim Ghorbani
    Spanning trees and the spectrum of line graphs, 2011
  30. ""
    Ebrahim Ghorbani
    Graphs with few matching roots, 2011