Results 51 to 60 of about 2,136 (139)
Ruled and rational surfaces and their models
One of the most powerful ideas in the study and classification of algebraic varieties is the notion of a model: that is, to single out an object, in the appropriate isomorphism class, with nice properties. This survey aims to define and study suitable models of rational and, more generally, ruled surfaces in the smooth complex case, and to use them to ...
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Ample vector bundles and rational surfaces ruled by cubics
Let $X$ be a smooth complex projective variety of dimension $n, \mathscr{E}$ an ample vector bundle on $X$ of rank $n - 2$ with a section vanishing on a smooth surface $Z \subset X$, and $H$ an ample line bundle on $X$ whose restriction $H_Z$ to $Z$ is ...
Antonio Lanteri
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Rational surfaces in index-one Fano hypersurfaces
, 2007 We give the first evidence for a conjecture that a general, index-one, Fano hypersurface is not unirational: (i) a general point of the hypersurface is contained in no rational surface ruled, roughly, by low-degree rational curves, and (ii) a general ...
Jason Starr, Roya Beheshti
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Rational Ruled surfaces construction by interpolating dual unit vectors representing lines
, 2006 In this paper, a new representational model is introduced for the rational family of ruled surfaces in Computer Graphics. The surface parameterization is constructed using the NURBS basis functions and line geometry.
Papageorgiou, Stavros G. +1 more
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On a Certain Class of Rational Ruled Surfaces [PDF]
American Journal of Mathematics, 1919 openaire +2 more sources
Inequivalent Lefschetz fibrations on rational and ruled surfaces
, 2018 For 2017 Georgia International Topology Conference ...
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Asymptotically counting points of bounded height [PDF]
, 2008 Widmer, Martin Lucien
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Uncommon pathogen, common activity: <i>Streptococcus pneumoniae</i> conjunctivitis outbreak traced to a primary school field trip. [PDF]
Front Public HealthDuan X +8 more
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Deciphering Structure-Bubble-Mass Transfer Relationships in Water Electrolysis Through Electrode Morphology Regulation. [PDF]
Adv Sci (Weinh)Tang Z +9 more
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Alternating groups and rational functions on surfaces
, 2006 Let X be a smooth complex projective surface. We prove that for any sufficiently big m there exists a rational dominant map f from X into a complex rational ruled surface Y, such that f is generically finite of degree m and has monodromy the alternating ...
BRIVIO, SONIA, PIROLA, GIAN PIETRO
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