和田秀男
Mass formula and structure of self-dual codes over Z 2 ∗ {\displaystyle \scriptstyle \mathbb {Z} _{2^{*}}} (with K.Nagata, F.Nemenzo), to appear in Designs, Code and Cryptography (2012)
On efficient computation of the 2-parts of ideal class groups of quadratic fields (with J. M. Basilla), Proc. Japan Acad. Ser. A Math. Sci. 80 (2004), no.10, 191-193
On the Diophantine equation x ( x + 1 ) ⋯ ( x + n ) + 1 = y 2 ( 17 ≤ n = o d d ≤ 27 ) {\displaystyle x(x+1)\cdots (x+n)+1=y^{2}(17\leq n=odd\leq 27)} , Proc. Japan Acad. Ser. A Math. Sci. 79 (2003), no. 5, 99-100
"Hasse principle" for free groups (with T. Ono), Proc. Japan Acad. Ser. A Math. Sci. 75 (1999), no.1, 1-2