JournalsprimsVol. 28, No. 4Publications of the Research Institute for Mathematical SciencesVolume 28, No. 4 (1992)pp. 503–533Principal Fiber Bundle Interpretation of the KP-HierarchyJosef DorfmeisterJacek Szmigielskipp. 535–578Crossed Products by Groupoid Actions and Their Smooth Flows of WeightsTakehiko Yamanouchipp. 579–586Some Remarks on Hypoelliptic Operators which are not Micro-hypoellipticYoshinori MorimotoTatsushi Moriokapp. 587–593A Note on Coherent States Related to Weighted ShiftsWlodzimierz MlakJan Stochelpp. 595–602Itô's Formula for Non-Smooth FunctionsRobert Aebipp. 603–614Some Descriptive-Set-Theoretical Problems in Complexity TheoryHisao Tanakapp. 615–652Generalized Whitehead Spaces with Few CellsNorio IwaseAkira KonoMamoru Mimurapp. 653–678Dual Weights on Crossed Products by Groupoid ActionsTakehiko Yamanouchi

pp. 503–533Principal Fiber Bundle Interpretation of the KP-HierarchyJosef DorfmeisterJacek Szmigielski

pp. 579–586Some Remarks on Hypoelliptic Operators which are not Micro-hypoellipticYoshinori MorimotoTatsushi Morioka