Sarobidy Razafimahatratra

340,

222 College St

Toronto, Canada

I am a Fields Institute postdoctoral fellow working with Ada Chan. From September 2022 to June 2024, I was a postdoctoral researcher in algebraic graph theory at the University of Primorska, working under the mentorship of Dragan Marušič. I completed my Ph.D in 2022 at the University of Regina under the supervision of Karen Meagher and Shaun Fallat.

I primarily work on Erdős–Ko–Rado type results for various combinatorial objects with algebraic flavours. I am particularly interested in problems related to permutation groups and algebraic graph theory. My other research interest is the study of certain properties of Cayley graphs (hamiltonicity, eigenvalues, symmetry). Recently, I have also started working on problems about quantum walks in graphs.

Feel free to contact me by email for more details.

If you are interested to give a talk in the York University Discrete Mathematics Seminar, please visit link

news

May 24, 2025	28th Ontario Combinatorics Workshop.
Nov 24, 2024	Movement and Symmetry in Graphs
Feb 16, 2024	Association Schemes and their Applications at the CMS summer meeting 2024

selected publications

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},
}