On global hypoellipticity of vector fields
Jorge Hounie (1982)
Journées équations aux dérivées partielles
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Jorge Hounie (1982)
Journées équations aux dérivées partielles
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Ping Xu (1997)
Annales scientifiques de l'École Normale Supérieure
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Eva Miranda (2014)
Open Mathematics
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The main purpose of this paper is to present in a unified approach to different results concerning group actions and integrable systems in symplectic, Poisson and contact manifolds. Rigidity problems for integrable systems in these manifolds will be explored from this perspective.
C. Maquera, L. F. Martins (2008)
Annales de la faculté des sciences de Toulouse Mathématiques
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In this paper we describe the orbit structure of -actions of on the solid torus having and as the only compact orbits, and as singular set.
Nguyen Tien Zung (1996)
Compositio Mathematica
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