Cylinders in weak del pezzo fibrations
WebCYLINDERS IN WEAK DEL PEZZO FIBRATIONS 3 (1) Scontains an A1 k-cylinder if and only if d= 8 and Sis endowed with a structure of Mori conic bundle admitting a section defined over k. (2) Scontains the affine plane A2 k if and only if d= 8 and S(k) 6= ∅. Note that Theorem 1.7 excludes the case of Picard rank one since it has already been studied
Cylinders in weak del pezzo fibrations
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WebDec 18, 2014 · Certainly, cylinders are geometrically simple objects, however they received a lot of attention recently from the viewpoint of unipotent group actions on affine cones over polarized varieties... WebDec 19, 2024 · In this article, we shall look into the existence of vertical cylinders contained in a weak del Pezzo fibration as a generalization of the former work due to Dubouloz …
WebMar 30, 2024 · We establish two results on three-dimensional del Pezzo fibrations in positive characteristic. First, we give an explicit bound for torsion index of relatively torsion line bundles. Second, we show the existence of purely inseparable sections with explicit bounded degree. ... Schröer, S., Weak del Pezzo surfaces with irregularity, Tohoku Math ... WebIn this article, we shall look into the existence of vertical cylinders contained in a weak del Pezzo fibration as a generalization of the former work due to Dubouloz and Kishimoto in …
WebOct 28, 2010 · We classify all the effective anticanonical divisors on weak del Pezzo surfaces. Through this classification we obtain the smallest number among the log canonical thresholds of effective anticanonical divisors on a given Gorenstein canonical del Pezzo surface. Keywords del Pezzo surfaceeffective anticanonical divisorlog canonical threshold WebIn this article, we shall look into the existence of vertical cylinders contained in a weak del Pezzo fibration as a generalization of the former work due to Dubouloz and Kishimoto in …
WebApr 13, 2024 · Abstract. In this article, we shall look into the existence of vertical cylinders contained in a weak del Pezzo fibration as a …
WebFamilies of simple subgroups in the Cremona group arising from del Pezzo fibrations Igor Krylov (KIAS Seoul, Republic of Korea) ... Cylinders in canonical del Pezzo fibrations Masatomo Sawahara (Saitama University, Japan) ... Classification of toric log del Pezzo surfaces with few singular points Yusuke Suyama (Osaka University, Japan) ... iphone 12 price myrWebIn this paper we describe stable rank two bundles on Del-Pezzo fibrations of degree 1 and 2 exploiting the correspondence with the lines in fibers. We show ... CYLINDERS IN WEAK DEL PEZZO FIBRATIONS. 13 April 2024. MASATOMO SAWAHARA. Extending rationally connected fibrations from ample subvarieties. 09 July 2024. iphone 12 price nowWebDec 18, 2024 · Cylinders in canonical del Pezzo fibrations Masatomo Sawahara Cylinders in projective varieties play an important role in connection with unipotent group actions on certain affine algebraic varieties. The previous work due to Dubouloz and Kishimoto deals with the condition for a del Pezzo fibration to contain a vertical cylinder. iphone 12 price phWebIn all cases, these surfaces satisfy weak approximation (assuming they have a point). July 24th: Showed that del Pezzo surfaces of degree 5 always have a rational point and are birational to the plane, over the ground field. Introduced the Azumaya Brauer group and the cohomological Brauer group (which coincide for nice varieties). iphone 12 price monthlyWebNov 27, 2024 · CYLINDERS IN WEAK DEL PEZZO FIBRATIONS Authors MASATOMO SAWAHARA Content type: OriginalPaper Published: 13 April 2024 Pages: 413 - 437 … iphone 12 pricespyWebDec 18, 2024 · Cylinders in projective varieties play an important role in connection with unipotent group actions on certain affine algebraic varieties. The previous work due to Dubouloz and Kishimoto deals... iphone 12 price sharaf dgWebApr 13, 2024 · In this article, we shall look into the existence of vertical cylinders contained in a weak del Pezzo fibration as a generalization of the former work of Dubouloz and … iphone 12 price thane