Results 81 to 90 of about 449 (213)

A Tour on Classical Theorems on Multisecant Lines of Projective Varieties and Problems

open access: yes, 1999
This note is intended to introduce some interesting classical re- sults on multisecant lines of projective varieties, varieties swept out by mul- tisecants and open questions regarding them to mathematicians with modest background on algebraic geometry ...
Kwak, Sijong
core  

Projective moduli spaces of complexes of sheaves

open access: yes, 2021
Thesis (Ph.D.)--University of Washington, 2021Since the introduction of Bridgeland stability conditions, constructing moduli spaces of complexes has become an increasingly important task in algebraic geometry.
Tajakka, Tuomas
core  

Affinification: A Fine Approximation of Deformations

open access: yesComputer Graphics Forum, EarlyView.
Abstract We introduce affinification, a novel method for accelerating physics‐based animation of elastic solids. During a time‐dependent simulation, our method automatically partitions the space into affine and elastic regions depending on the deformation.
A. Mercier‐Aubin   +3 more
wiley   +1 more source

Projective Geometry and Formal Geometry, Series ``Monografie Matematyczne'' Vol. 65, Birkh"auser-Verlag, 2004. (MR: 2005i:14066)

open access: yes, 2004
This is a research monograph intending to stress on the relevance of Formal Geometry in certain questions of Projective Geometry. The aim of the monograph is to introduce the reader to modern methods of projective geometry involving certain techniques ...
BADESCU, LUCIAN SILVESTRU
core  

Progressively Projected Newton's Method

open access: yesComputer Graphics Forum, EarlyView.
Abstract Newton's Method is widely used to find the solution of complex non‐linear simulation problems. To guarantee a descent direction, it is common practice to clamp the negative eigenvalues of each element Hessian prior to assembly—a strategy known as Projected Newton (PN)—but this perturbation often hinders convergence.
J. A. Fernández‐Fernández   +2 more
wiley   +1 more source

A view on extending morphisms from ample divisors

open access: yes, 2009
The philosophy that ``a projective manifold is more special than any of its smooth hyperplane sections" was one of the classical principles of projective geometry.
P. IONESCU, BELTRAMETTI, MAURO CARLO
core  

Survey on differential estimators for 3d point clouds

open access: yesComputer Graphics Forum, EarlyView.
Abstract Recent advancements in 3D scanning technologies, including LiDAR and photogrammetry, have enabled the precise digital replication of real‐world objects. These methods are widely used in fields such as GIS, robotics, and cultural heritage. However, the point clouds generated by such scans are often noisy and unstructured, posing challenges for ...
Léo Arnal–Anger   +4 more
wiley   +1 more source

Finite geometry and character theory

open access: yes, 1995
Difference sets are of central interest in finite geometry and design theory. One of the main techniques to investigate abelian difference sets is a discrete version of the classical Fourier transform (i.e., character theory) in connection with algebraic
Pott, Alexander (Prof.), Pott, Alexander
core   +1 more source

Hierarchical Optimization of the As‐Rigid‐As‐Possible Energy

open access: yesComputer Graphics Forum, EarlyView.
Abstract The As‐Rigid‐As‐Possible (ARAP) energy [SA07] has become a versatile ingredient in various geometry processing and machine learning methods. The classic method for its minimization is a block coordinate descent, alternating between local rotation estimation and a global linear solve, which converges slowly for large problem instances.
Hendrik Meyer, Bernd Bickel, Marc Alexa
wiley   +1 more source

Incidence geometry from an algebraic graph theory point of view

open access: yes, 2011
The goal of this thesis is to apply techniques from algebraic graph theory to finite incidence geometry. The incidence geometries under consideration include projective spaces, polar spaces and near polygons.
Vanhove, Frédéric
core  

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