Results 91 to 100 of about 2,710 (220)

The Two Extremal Rays of Some Hyper–Kähler Fourfolds

Mathematische Nachrichten, Volume 299, Issue 8, Page 2161-2176, August 2026.
ABSTRACT We consider projective Hyper–Kähler manifolds of dimension 4 that are deformation equivalent to Hilbert squares of K3 surfaces. In case such a manifold admits a divisorial contraction, the exceptional divisor is a conic bundle over a K3 surface. A classification of lattice embeddings implies that there are five types of such conic bundles.
Federica Galluzzi, Bert van Geemen
wiley   +1 more source

Characteristic numbers and chromatic polynomial of a tensor

Forum of Mathematics, Sigma
We introduce the characteristic numbers and the chromatic polynomial of a linear subspace of matrices, or equivalently of a tensor. Our approach generalizes and unifies the chromatic polynomial of a graph and of a matroid, characteristic numbers of ...
Austin Conner, Mateusz Michalek
doaj   +1 more source

Parameter‐Preserving Real‐time BIM Rendering via Direct GPU Ray Tracing

Computer Animation and Virtual Worlds, Volume 37, Issue 4, July/August 2026.
Parametric BIM geometry is preserved from Revit extraction to GPU ray tracing without mesh tessellation. A two‐tier cache reuses repeated geometry during export, and an instanced OptiX representation reduces memory at render time. The method lowers export time and GPU memory while preserving exact curved surfaces.
Jaehyuk Lim, Donggyu Lee, Junghyun Han, Seung‐wook Kim   +3 more
wiley   +1 more source

On the geometry of quadrics and their degenerations

Commentarii Mathematici Helvetici, 1988
[No abstract available]
DE CONCINI, Corrado, M. Goresky, R. Macpherson, C. Procesi   +3 more
openaire   +2 more sources

Analytical quadrics

, 1960
Analytical Quadrics focuses on the analytical geometry of three dimensions. The book first discusses the theory of the plane, sphere, cone, cylinder, straight line, and central quadrics in their standard forms.
Stark, M, Sneddon, I N, Spain, Barry, Ulam, S   +3 more
core  

B-geometries and flocks of hyperbolic quadrics [PDF]

, 2003
We give a characteristic-free proof of the classification theorem for flocks of hyperbolic quadrics of PG(3,q)
DURANTE N., Durante, Nicola, SICILIANO, Alessandro   +2 more
core   +1 more source

Koszul binomial edge ideals

Forum of Mathematics, Sigma
The study of Koszul binomial edge ideals was initiated by V. Ene, J. Herzog, and T. Hibi in 2014, who found necessary conditions for Koszulness. The binomial edge ideal $J_G$ associated to a finite simple graph G is always generated by quadrics ...
Adam LaClair, Matthew Mastroeni, Jason McCullough, Irena Peeva   +3 more
doaj   +1 more source

Concepts of the Dynamic Parser Zz

, 1995
ZEUTHEN, GERMANIA FTP://FTP.IFH.DE/PUB/QUADRICS/QUADRICS95/PANIZZI.PS ...
PANIZZI, Emanuele
core  

Weak approximation for linear systems of quadrics [PDF]

, 2006
We give local conditions at ∞ ensuring that the intersection of n quadrics in PN, N≫n, satisfies weak ...
Larsen, Michael, Im, Bo-Hae
core   +1 more source

Quasi-quadrics and related structures

, 2000
In a projective space PG(n, q) a quasi-quadric is a set of points that has the same intersection numbers with respect to hyperplanes as a nondegenerate quadric in that space.
Hamilton, Nick, Hamilton, N., O'Keefe, C. M., Penttila, T, De Clerck, Frank, Hamilton, N. A., O'Keefe, CM, De Clerck, F., O'Keefe, C., Penttila, T.   +9 more
core