𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Caps on Classical Varieties and their Projections

✍ Scribed by Jürgen Bierbrauer; Antonio Cossidente; Yves Edel

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
120 KB
Volume
22
Category
Article
ISSN
0195-6698

No coin nor oath required. For personal study only.

✦ Synopsis

A family of caps constructed by G. L. Ebert, K. Metsch and T. Szönyi [8] results from projecting a Veronesian or a Grassmannian to a suitable lower-dimensional space. We improve on this construction by projecting to a space of much smaller dimension. More precisely, we partition P G(3r -1, q) into a (2r -1)-space, an (r -1)-space and q r -1 cyclic caps, each of size (q 2r -1)/(q -1). We also decide when one of our caps can be extended by a point from the (2r -1)-space or the (r -1)-space. The proof of the results uses several ingredients, most notably hyperelliptic curves.

📜 SIMILAR VOLUMES

On processing binary pictures via their
On processing binary pictures via their projections
✍ A. Fazekas; G. T. Herman; S. Matej 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 36 KB

There is a potential for substantial savings in computaprocess its projections, we may be able to reduce computational tional costs by replacing image-processing operations on certain bicosts to a significant extent. nary pictures by operations on their row and column sums. ᭧ 1998

On the X-rank with respect to linear pro
On the X-rank with respect to linear projections of projective varieties
✍ Edoardo Ballico; Alessandra Bernardi 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB 👁 1 views

## Abstract In this paper we improve the known bound for the __X__‐rank __R~X~__(__P__) of an element \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$P\in {\mathbb {P}}^N$\end{document} in the case where \documentclass{article}\usepackage{amssymb}\begin{document}\pagest

Polylactide copolymers: Effect of copoly
Polylactide copolymers: Effect of copolymer ratio and end capping on their properties
✍ D. M. Bigg 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 173 KB 👁 2 views

## Abstract Racemic copolymers of polylactic acid were investigated to determine the effect of copolymer ratio on melting point, degree of crystallinity, mechanical properties, and processing behavior. The copolymer ratio was found to have a strong influence on the crystallization behavior of the p

Protein composition of some Croatian and
Protein composition of some Croatian and German wheat varieties and their influence on the loaf volume
✍ Unbehend, Ljiljana ;Unbehend, G. ;Lindhauer, M. G. 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 931 KB

## Abstract Ten Croatian and five German wheat varieties were tested. Wheat protein composition was analysed according to a modified Osborne fractionation. They were extracted in four fractions: NaCl fraction, ethanol fraction, acetic acid fraction and insoluble fraction. The influence of protein a