The aim of the Proceedings of the Japan Academy, Series A is the rapid publication of original papers in mathematical sciences.
On sufficient conditions for the uniqueness of the solution of $\frac{{dy}} {{dx}} = f\left( {x,y} \right)$
Tatsujirô Shimizu. (1928)
Subprojective transformations, subprojective spaces and subprojective collineations
Kentaro Yano. (1944)
