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Generalized principal lattices and cubic pencils

✍ Scribed by J. M. Carnicer; C. Godés

Publisher
Springer US
Year
2007
Tongue
English
Weight
327 KB
Volume
44
Category
Article
ISSN
1017-1398

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📜 SIMILAR VOLUMES

Cubic pencils of lines and bivariate int
Cubic pencils of lines and bivariate interpolation
✍ J.M. Carnicer; M. Gasca 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 316 KB

Cubic pencils of lines are classified up to projectivities. Explicit formulae for the addition of lines on the set of nonsingular lines of the pencils are given. These formulae can be used for constructing planar generalized principal lattices, which are sets of points giving rise to simple Lagrange

The r-cubical Lattice and a Generalizati
The r-cubical Lattice and a Generalization of the cd-index
✍ Richard Ehrenborg; Margaret Readdy 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 390 KB

In this paper we generalize the cd -index of the cubical lattice to an r -cd -index , which we denote by Õ ( r ) . The coef ficients of Õ ( r ) enumerate augmented Andre ´ r -signed permutations , a generalization of Purtill's work relating the cd -index of the cubical lattice and signed Andre ´ per