JAPANESE JOURNAL OF MATHEMATICS

VOL. 25, NO. 1, 1999


CONTENTS

J. VAILLANT: Invariants des systemes d'operaleurs dilTerenti'els et
sommes formelles asymptotiques ................... 1


1. Yokota: 2-graded decompositions of exceptional Lie algebras g and
group realizations oFgev,go Part II, G==E7 ............. 155


E. NAKAGLJCHI and A. YAGI: Error estimates of implicit Runge-
Kutta methods for quasilinear abstract equations of parabolic
type in Banach spaces ......................... 181