JournalsprimsVol. 28, No. 4Publications of the Research Institute for Mathematical SciencesVolume 28, Number 4, 1992DOI: 10.4171/prims | ISSN: 0034-5318 | eISSN: 1663-4926Principal Fiber Bundle Interpretation of the KP-HierarchyJosef DorfmeisterJacek Szmigielskipp. 503–533Crossed Products by Groupoid Actions and Their Smooth Flows of WeightsTakehiko Yamanouchipp. 535–578Some Remarks on Hypoelliptic Operators which are not Micro-hypoellipticYoshinori MorimotoTatsushi Moriokapp. 579–586A Note on Coherent States Related to Weighted ShiftsWlodzimierz MlakJan Stochelpp. 587–593Itô's Formula for Non-Smooth FunctionsRobert Aebipp. 595–602Some Descriptive-Set-Theoretical Problems in Complexity TheoryHisao Tanakapp. 603–614Generalized Whitehead Spaces with Few CellsNorio IwaseAkira KonoMamoru Mimurapp. 615–652Dual Weights on Crossed Products by Groupoid ActionsTakehiko Yamanouchipp. 653–678

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

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