Preprints
Momonari Kudo, Tomoki Moriya and Ryo Ohashi: "Explicit plane sextic models for genus-five Howe curves and enumeration of superspecial ones", in preparation.
Takumi Ogasawara, Ryo Ohashi, Kosuke Sakata and Shushi Harashita: "Superspecial genus-4 double covers of elliptic curves", arXiv:2403.08139.
Ryo Ohashi, Hiroshi Onuki, Momonari Kudo, Ryo Yoshizumi and Koji Nuida: "Listing superspecial curves of genus three by using Richelot isogeny graph", arXiv:2401.10500.
Journal articles
Ryo Ohashi and Momonari Kudo: "Computing superspecial hyperelliptic curves of genus 4 with automorphism group properly containing the Klein 4-group", Journal of Computational Algebra, to appear (preprint ver: arXiv:2312.16858).
Ryo Ohashi, Momonari Kudo and Shushi Harashita: "The a-numbers of non-hyperelliptic curves of genus 3 with cyclic automorphism group of order 6", Acta Arithmetica, to appear (preprint ver: arXiv:2111.09777).
Ryo Ohashi: "On the Rosenhain forms of superspecial curves of genus two", Finite Fields and Their Applications 97 (2024), Article ID: 102445.
Ryo Ohashi and Shushi Harashita: "Differential forms on the curves associated to Appell-Lauricella hypergeometric series and the Cartier operator on them", Yokohama Mathematical Journal 69 (2023), 1–32.
Ryo Ohashi: "Maximality of Ciani curves over finite fields", Finite Fields and Their Applications 83 (2022), Article ID: 102089.
Ryo Ohashi: "On the maximality of hyperelliptic Howe curves of genus 3", Kodai Mathematical Journal 45 (2022), No. 2, 282–294.
Conference proceedings
Ryo Ohashi, Momonari Kudo and Shushi Harashita: "Fast enumeration of superspecial hyperelliptic curves of genus 4 with automorphism group V_4", In: S. Mesnager, Z. Zhou (eds), Arithmetic of Finite Fields, WAIFI2022, Lecture Notes in Computer Science 13638 (2023), 107–124.
Others
Ryo Ohashi, Hiroshi Onuki, Momonari Kudo, Ryo Yoshizumi and Koji Nuida: "Computation of the superspecial (2,2)-isogeny graph using theta functions", 数理解析研究所講究録, No. 2280, 12–22, 2024 (pdf).
Ryo Ohashi: "The a-numbers, superspeciality and maximality of genus-3 curves", 第20回代数曲線論シンポジウム報告集, 11–23, 2022 (pdf).