SUGAKU EXPOSITIONS
CONTENTS
Vol. 12, No. I June 1999

Tomohide Terasoma, A product formula for period integrals ............ 1
Osamu Saeki, Global theory of singularities of differentiable mappings:

Present status and prospects ......................................... 21
Toshiaki Suzuki, The classical theta functions and distinguished

representations of metaplectic groups ................................ 39
Masaru Ikehata and Gen Nakamura, Inverse boundary value problem...

15 years since Galderon raised the problem .......................... 57
Shoshichi Kobayashi, Differential geometry in Japan in the 1940s and

1950s................................................................ 85
Shin-ichi Doi, On regularizing effects for Schrodinger-type equations . . . . . 95
Toshio Nishino, Mathematics of Professor Kiyoshi Oka: Birth of "ideaux
de domaines indetermines" .......................................... 107