General algebraic geometry and formal concept analysis.
Becker, T. (1999)
Acta Mathematica Universitatis Comenianae. New Series
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Becker, T. (1999)
Acta Mathematica Universitatis Comenianae. New Series
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E. Ballico, C. Fontanari (2003)
Open Mathematics
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In this paper we study the k-th osculating variety of the order d Veronese embedding of P n. In particular, for k=n=2 we show that the corresponding secant varieties have the expected dimension except in one case.
Achilles, Rüdiger, Stückrad, Jürgen (2007)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Krasiński, Tadeusz, Spodzieja, Stanisław (2001)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Gurycz, Jerzy (2001)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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David Kruml (2008)
Commentationes Mathematicae Universitatis Carolinae
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Flat covers do not exist in all varieties. We give a necessary condition for the existence of flat covers and some examples of varieties where not all algebras have flat covers.
Kunz, Ernst, Waldi, Rolf (2007)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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Sławomir Cynk, Kamil Rusek (1991)
Annales Polonici Mathematici
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We prove that every injective endomorphism of an affine algebraic variety over an algebraically closed field of characteristic zero is an automorphism. We also construct an analytic curve in ℂ⁶ and its holomorphic bijection which is not a biholomorphism.
Manivel, Laurent (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Jarnicki, Witold, O'Carroll, Liam, Winiarski, Tadeusz (2001)
Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
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