Counting superspecial Richelot isogenies and its cryptographic application. - Toshiyuki Katsura; Katsuyuki Takashima (CoRR, 2020)

Decomposed Richelot isogenies of Jacobian varieties of hyperelliptic curves and generalized Howe curves. - Toshiyuki Katsura; Katsuyuki Takashima (CoRR, 2021)

The 2-divisibility of divisors on K3 surfaces in characteristic 2. - Toshiyuki Katsura; Shigeyuki Kondo; Matthias Schütt (CoRR, 2024)