2024 Preprint On the Terwilliger algebra of the group association scheme of the symmetric group Sym(7) Allen Herman, Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Submitted, 2024 arXiv Bib @article{Talgebra, title = {On the Terwilliger algebra of the group association scheme of the symmetric group Sym(7)}, author = {Herman, Allen and Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Submitted}, year = {2024}, } Preprint On the size of cocliques of some Cayley graphs of GL_2(q) Andriaherimanana Sarobidy Razafimahatratra Submitted, 2024 Bib @article{Hcompression, title = {On the size of cocliques of some Cayley graphs of $GL_2(q)$}, author = {Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Submitted}, year = {2024}, } Preprint On the maximum intersecting sets of the general semilinear group of degree 2 Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra arXiv preprint arXiv:2402.17687, 2024 arXiv Bib @article{gammal, title = {On the maximum intersecting sets of the general semilinear group of degree $2$}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {arXiv preprint arXiv:2402.17687}, year = {2024}, } Hamiltonicity of certain vertex-transitive graphs revisited Klavdija Kutnar, Dragan Marušič, and Andriaherimanana Sarobidy Razafimahatratra Discrete Math. (to appear), 2024 Bib @article{Hcompressioo, title = {Hamiltonicity of certain vertex-transitive graphs revisited}, author = {Kutnar, Klavdija and Marušič, Dragan and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Discrete Math. (to appear)}, year = {2024}, } The intersection density of non-quasiprimitive groups of degree 3p Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Discrete Math. (accepted), 2024 arXiv Bib @article{degree3p, title = {The intersection density of non-quasiprimitive groups of degree $3p$}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Discrete Math. (accepted)}, year = {2024}, } Infinite families of vertex-transitive graphs with prescribed Hamilton compression Klavdija Kutnar, Dragan Marušič, and Andriaherimanana Sarobidy Razafimahatratra Annals Combin., 2024 arXiv Bib URL @article{Hcompressiop, title = {Infinite families of vertex-transitive graphs with prescribed Hamilton compression}, author = {Kutnar, Klavdija and Marušič, Dragan and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Annals Combin.}, year = {2024}, doi = {10.1007/s00026-024-00703-4}, dimensions = {false} } On the intersection spectrum of PSL_2(q) Angelot Behajaina, Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra J. Algebraic Combin., 2024 arXiv Bib URL @article{behajaina-psl, title = {On the intersection spectrum of $PSL_{2}(q)$}, author = {Behajaina, Angelot and Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {J. Algebraic Combin.}, year = {2024}, doi = {10.1007/s10801-024-01356-5}, dimension = {false}, } On cocliques in commutative Schurian association schemes of the symmetric group Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Australasian J. Combin., 2024 arXiv Bib URL @article{cocliquesschurianscheme, title = {On cocliques in commutative Schurian association schemes of the symmetric group}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Australasian J. Combin.}, year = {2024}, } Intersection density of imprimitive groups of degree pq Angelot Behajaina, Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra J. Combin. Theory Ser. A, 2024 arXiv Bib URL PDF @article{degreepq, title = {Intersection density of imprimitive groups of degree pq}, author = {Behajaina, Angelot and Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {J. Combin. Theory Ser. A}, year = {2024}, } A short note on non-diagonalizable vertex-primitive digraphs Andriaherimanana Sarobidy Razafimahatratra Australas. J. Combin., 2024 Bib URL PDF @article{non-diagonalizable, title = {A short note on non-diagonalizable vertex-primitive digraphs}, author = {Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Australas. J. Combin.}, year = {2024}, } The q-Analogue of Zero Forcing for Certain Families of Graphs Shaun Fallat, Neha Joshi, Roghayeh Maleki, Karen Meagher, Seyed Ahmad Mojallal, Shahla Nasserasr, Mahsa N. Shirazi, Andriaherimanana Sarobidy Razafimahatratra, and Brett Stevens Discrete Appl. Math., 2024 arXiv Bib URL @article{Zq, title = {The $q$-Analogue of Zero Forcing for Certain Families of Graphs}, author = {Fallat, Shaun and Joshi, Neha and Maleki, Roghayeh and Meagher, Karen and Mojallal, Seyed Ahmad and Nasserasr, Shahla and Shirazi, Mahsa N. and Razafimahatratra, Andriaherimanana Sarobidy and Stevens, Brett}, journal = {Discrete Appl. Math.}, year = {2024}, } On the intersection density of the Kneser Graph K(n,3) Karen Meagher, and Andriaherimanana Sarobidy Razafimahatratra European J. Combin., 2024 arXiv Bib URL PDF @article{psl, title = {On the intersection density of the Kneser Graph $K(n,3)$}, author = {Meagher, Karen and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {European J. Combin.}, year = {2024}, } 2023 Preprint On cospectral Cayley graphs on the symmetric group Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra submitted, 2023 Bib @article{cospectral-cayley-graphs, title = {On cospectral Cayley graphs on the symmetric group}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {submitted}, year = {2023}, } On the second eigenvalue of certain Cayley graphs on the symmetric group Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Bull. Malays. Math. Sci. Soc., 2023 arXiv Bib URL @article{second-eigenvalues, title = {On the second eigenvalue of certain Cayley graphs on the symmetric group}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Bull. Malays. Math. Sci. Soc.}, volume = {46}, year = {2023}, doi = {10.1007/s40840-023-01553-8}, dimensions = {true}, } On closed distance magic circulants of valency up to 5 Blas Fernández, Roghayeh Maleki, Štefko Miklavič, and Andriaherimanana Sarobidy Razafimahatratra Discrete Math., 2023 arXiv Bib URL @article{cdm, title = {On closed distance magic circulants of valency up to $5$}, author = {Fernández, Blas and Maleki, Roghayeh and Miklavič, Štefko and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Discrete Math.}, volume = {346}, year = {2023}, doi = {10.1016/j.disc.2023.113581}, dimensions = {true}, } On the intersection density of the symmetric group acting on uniform subsets of small size Angelot Behajaina, Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Linear Algebra Appl., 2023 arXiv Bib URL @article{behajaina2022intersection, title = {On the intersection density of the symmetric group acting on uniform subsets of small size}, author = {Behajaina, Angelot and Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {Linear Algebra Appl.}, year = {2023}, doi = {10.1016/j.laa.2023.01.010}, dimensions = {true} } On the intersection density of primitive groups of degree a product of two odd primes Andriaherimanana Sarobidy Razafimahatratra J. Combin. Theory Ser. A, 2023 arXiv Bib URL @article{razafimahatratra2021intersection, title = {On the intersection density of primitive groups of degree a product of two odd primes}, author = {Razafimahatratra, Andriaherimanana Sarobidy}, journal = {J. Combin. Theory Ser. A}, volume = {194}, year = {2023}, doi = {10.1016/j.jcta.2022.105707}, dimensions = {true} } 2022 Some Erdos-Ko-Rado results for linear and affine groups of degree two Karen Meagher, and A. Sarobidy Razafimahatratra The Art of Discrete and Applied Mathematics, 2022 Bib URL PDF @article{Meagher-GL, author = {Meagher, Karen and Razafimahatratra, A. Sarobidy}, title = {Some {E}rdos-{K}o-{R}ado results for linear and affine groups of degree two}, journal = {The Art of Discrete and Applied Mathematics}, fjournal = {The Art of Discrete and Applied Mathematics}, volume = {}, year = {2022}, doi = {10.26493/2590-9770.1494.1e4}, dimensions = {true}, } 2021 The Erdős-Ko-Rado theorem for 2-pointwise and 2-setwise intersecting permutations Karen Meagher, and A. Sarobidy Razafimahatratra Electron. J. Combin., 2021 Bib URL @article{MR4328908, author = {Meagher, Karen and Razafimahatratra, A. Sarobidy}, title = {The {E}rd\H{o}s-{K}o-{R}ado theorem for 2-pointwise and 2-setwise intersecting permutations}, journal = {Electron. J. Combin.}, fjournal = {Electronic Journal of Combinatorics}, volume = {28}, year = {2021}, number = {4}, pages = {Paper No. 4.10, 21}, mrclass = {05D10 (05A05)}, mrnumber = {4328908}, doi = {10.37236/9556}, dimensions = {true}, } Weakly Hadamard diagonalizable graphs Mohammad Adm, Khawla Almuhtaseb, Shaun Fallat, Karen Meagher, Shahla Nasserasr, Mahsa N. Shirazi, and A. S. Razafimahatratra Linear Algebra Appl., 2021 Bib URL PDF @article{MR4159285, author = {Adm, Mohammad and Almuhtaseb, Khawla and Fallat, Shaun and Meagher, Karen and Nasserasr, Shahla and Shirazi, Mahsa N. and Razafimahatratra, A. S.}, title = {Weakly {H}adamard diagonalizable graphs}, journal = {Linear Algebra Appl.}, fjournal = {Linear Algebra and its Applications}, volume = {610}, year = {2021}, pages = {86--119}, issn = {0024-3795}, mrclass = {05C50 (15A18 15B34)}, mrnumber = {4159285}, mrreviewer = {Shunyi Liu}, doi = {10.1016/j.laa.2020.09.038}, dimensions = {true}, } 3-setwise intersecting families of the symmetric group Angelot Behajaina, Roghayeh Maleki, Aina Toky Rasoamanana, and A. Sarobidy Razafimahatratra Discrete Math., 2021 arXiv Bib URL @article{MR4262022, author = {Behajaina, Angelot and Maleki, Roghayeh and Rasoamanana, Aina Toky and Razafimahatratra, A. Sarobidy}, title = {3-setwise intersecting families of the symmetric group}, journal = {Discrete Math.}, fjournal = {Discrete Mathematics}, volume = {344}, year = {2021}, number = {8}, pages = {Paper No. 112467, 15}, issn = {0012-365X}, mrclass = {05D05 (20B30)}, mrnumber = {4262022}, mrreviewer = {Elad Aigner-Horev}, doi = {10.1016/j.disc.2021.112467}, dimensions = {true}, } On triangles in derangement graphs Karen Meagher, Andriaherimanana Sarobidy Razafimahatratra, and Pablo Spiga J. Combin. Theory Ser. A, 2021 arXiv Bib URL @article{MR4195884, author = {Meagher, Karen and Razafimahatratra, Andriaherimanana Sarobidy and Spiga, Pablo}, title = {On triangles in derangement graphs}, journal = {J. Combin. Theory Ser. A}, fjournal = {Journal of Combinatorial Theory. Series A}, volume = {180}, year = {2021}, pages = {Paper No. 105390, 26}, issn = {0097-3165}, mrclass = {05C25 (05C69 05D10)}, mrnumber = {4195884}, mrreviewer = {Norihide Tokushige}, doi = {10.1016/j.jcta.2020.105390}, dimensions = {true}, } On non-normal subgroup perfect codes Behajaina, Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra Australas. J. Combin., 2021 arXiv Bib URL @article{MR4333853, author = {Behajaina and Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, title = {On non-normal subgroup perfect codes}, journal = {Australas. J. Combin.}, fjournal = {The Australasian Journal of Combinatorics}, volume = {81}, year = {2021}, pages = {474--479}, issn = {1034-4942}, mrclass = {05C69}, mrnumber = {4333853}, mrreviewer = {T. Tamizh Chelvam}, } On complete multipartite derangement graphs Andriaherimanana Sarobidy Razafimahatratra Ars Math. Contemp., 2021 arXiv Bib URL @article{MR4341193, author = {Razafimahatratra, Andriaherimanana Sarobidy}, title = {On complete multipartite derangement graphs}, journal = {Ars Math. Contemp.}, fjournal = {Ars Mathematica Contemporanea}, volume = {21}, year = {2021}, number = {1}, pages = {Paper No. 7, 15}, issn = {1855-3966}, mrclass = {05D05 (05C35 05C69 20B05)}, mrnumber = {4341193}, doi = {10.26493/1855-3974.2554.856}, dimensions = {true}, } Preprint No Hilton-Milner type results for linear groups of degree two Roghayeh Maleki, and Andriaherimanana Sarobidy Razafimahatratra arXiv preprint arXiv:2111.03829, 2021 arXiv Bib @article{maleki2021no, title = {No Hilton-Milner type results for linear groups of degree two}, author = {Maleki, Roghayeh and Razafimahatratra, Andriaherimanana Sarobidy}, journal = {arXiv preprint arXiv:2111.03829}, year = {2021}, } 2020 Zero-one laws for k-variable first-order logic of sparse random graphs A. S. Razafimahatratra, and M. Zhukovskii Discrete Appl. Math., 2020 arXiv Bib URL @article{MR4075521, author = {Razafimahatratra, A. S. and Zhukovskii, M.}, title = {Zero-one laws for {$k$}-variable first-order logic of sparse random graphs}, journal = {Discrete Appl. Math.}, fjournal = {Discrete Applied Mathematics. The Journal of Combinatorial Algorithms, Informatics and Computational Sciences}, volume = {276}, year = {2020}, pages = {121--128}, issn = {0166-218X}, mrclass = {05C80 (03C13)}, mrnumber = {4075521}, mrreviewer = {Vera Koponen}, doi = {10.1016/j.dam.2019.02.032}, dimensions = {true}, }