On complete orbit spaces of SL(2) actions
Andrzej Białynicki-Birula, Joanna Święcicka (1988)
Colloquium Mathematicae
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Andrzej Białynicki-Birula, Joanna Święcicka (1988)
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Jerzy Jurkiewicz (1987)
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William Browder (1990)
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Klaus Kaiser (1973)
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Hausen, Jürgen (2001)
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Ewa Duma (1990)
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Andrzej Białynicki-Birula, Joanna Święcicka (1992)
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The aim of this paper is to extend the results of [BB-Ś2] concerning geometric quotients of actions of SL(2) to the case of good quotients. Thus the results of the present paper can be applied to any action of SL(2) on a complete smooth algebraic variety, while the theorems proved in [BB-Ś2] concerned only special situations.
Lenka Zalabová (2014)
Open Mathematics
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We construct a non-homogeneous contact projective structure which is symmetric from the point of view of parabolic geometries.
Andrzej Miernowski, Witold Mozgawa (1997)
Collectanea Mathematica
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Grassmannians of higher order appeared for the first time in a paper of A. Szybiak in the context of the Cartan method of moving frame. In the present paper we consider a special case of higher order Grassmannian, the projective space of second order. We introduce the projective group of second order acting on this space, derive its Maurer-Cartan equations and show that our generalized projective space is a homogeneous space of this group.
Alicia Dickenstein, Sandra Di Rocco, Ragni Piene (2014)
Annales de l’institut Fourier
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The notion of higher order dual varieties of a projective variety, introduced by Piene in 1983, is a natural generalization of the classical notion of projective duality. In this paper we study higher order dual varieties of projective toric embeddings. We express the degree of the second dual variety of a 2-jet spanned embedding of a smooth toric threefold in geometric and combinatorial terms, and we classify those whose second dual variety has dimension less than expected. We also...
Tor Skjelbred (1974)
Mathematica Scandinavica
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Ib Madsen, I. Hambleton, R. Lee (1989)
Commentarii mathematici Helvetici
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R.S. Kulkarni (1982)
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