Browsing by Subject "Geometry, Algebraic"
Now showing items 120 of 92

A geometric approach to dense Cayley digraphs of finite Abelian groups
(Elsevier, 2016)
Conference report
Open AccessWe give a method for constructing infinite families of dense (or eventually likely dense) Cayley digraphs of finite Abelian groups. The diameter of the digraphs is obtained by means of the related {\em minimum distance ... 
A Koszul complex over skew polynomial rings
(20190101)
Article
Open AccessWe construct a Koszul complex in the category of left skew polynomial rings associated with a flat endomorphism that provides a finite free resolution of an ideal generated by a Koszul regular sequence 
A note on a conjecture of Xiao
(1998)
Article
Open Access 
A note on a question of Fujita and a conjecture of Xiao
(1998)
Article
Open Access 
A note on Bernstein–Sato ideals
(20221031)
Article
Open AccessWe define the Bernstein–Sato ideal associated to a tuple of ideals and we relate it to the jumping points of the corresponding mixed multiplier ideals. 
A Torelli theorem for the moduli space of parabolic rank two vector bundles over curves.
(1998)
Article
Open AccessLet S (respectively, S') be a finite subset of a compact connected Riemann surface X (respectively, X') of genus at least two. Let M (respectively, M') denote a moduli space of parabolic stable bundles of rank two over X ... 
Algebra and geometry in Pietro Mengoli (16251686)
(2003)
Article
Open AccessOne of the most important steps in the research carried out in the seventeenth century into new ways of calculating quadratures was the proposal of algebraic procedures. Pietro Mengoli (16251686), probably the most ... 
Algebraic description of jacobians isogeneous to certain prym varieties with polarization (1,2)
(20180101)
Article
Open AccessFor a class of nonhyperelliptic genus 3 curves C which are twofold coverings of elliptic curves E, we give an explicit algebraic description of all birationally nonequivalent genus 2 curves whose Jacobians are degree 2 ... 
Algebraic phylogenetic reconstruction based on proteins and its application to Persea americana
(Universitat Politècnica de Catalunya, 201809)
Bachelor thesis
Open AccessPhylogenetic reconstruction methods attempt to infer the evolutionary relationships among a group of species. Apart from classical reconstruction methods, new methods have been developed based on algebraic relationships ... 
Analysis of satellite constellations for the continuous coverage of ground regions
(20171101)
Article
Open AccessThis paper studies the problem of analyzing multisatellite constellations with respect to their coverage capacity of areas on Earth’s surface. The geometric configuration of constellation projection points on Earth’s surface ... 
Approximation of tensor fields on surfaces of arbitrary topology based on local Monge parametrizations
(20200315)
Article
Open AccessWe introduce a new method, the Local Monge Parametrizations (LMP) method, to approximate tensor fields on general surfaces given by a collection of local parametrizations, e.g. as in finite element or NURBS surface ... 
Asymptotic enumeration of noncrossing partitions on surfaces
(20130301)
Article
Open AccessWe generalize the notion of noncrossing partition on a disk to general surfaces with boundary. For this, we consider a surface S and introduce the number CS(n) of noncrossing partitions of a set of n points laying on the ... 
Automatic generation of hexahedral meshes for volumes with nonplanar surfaces using the multisweeping method
(2010)
Conference report
Open AccessOne of the most used algorithms to generate hexahedral meshes for extrusion volumes is the multisweeping method. The algorithm decomposes the geometry into manytoone subvolumes and then meshes each subvolume ... 
Automorphisms of Thompson groups
(Universitat Politècnica de Catalunya, 202107)
Master thesis
Open AccessIn this work, based on a Brin's article, we explain the structure of automorphism group of F, via a short exact sequence involving the subgroup of automorphisms of F together with the product of two copies of Thompson s ... 
Álgebra geométrica y geometrías ortogonales
(Real Sociedad Matemática Española, 201610)
Article
Open Access 
Bernstein–Sato theory for determinantal ideals in positive characteristic
(Universitat Politècnica de Catalunya, 20230524)
Bachelor thesis
Open Access
Covenantee: University of UtahSigui R un anell de polinomis sobre un cos k. Una varietat algebraica sobre k és un conjunt de punts on s'anul·len alguns polinomis de R. Amb la finalitat d'estudiar aquestes varietats i les seves singularitats, una pràctica ... 
Black body radiation calculus through fermionic string theory
(20180325)
Research report
Restricted access  author's decision 
Blending isogeometric analysis and local maximum entropy meshfree approximants
(201309)
Article
Open AccessWe present a method to blend local maximum entropy (LME) meshfree approximants and isogeometric analysis. The coupling strategy exploits the optimization program behind LME approximation, treats isogeometric and LME basis ... 
Computing optimal shortcuts for networks
(Elsevier, 20191116)
Article
Open AccessWe study augmenting a plane Euclidean network with a segment, called a shortcut, to minimize the largest distance between any two points along the edges of the resulting network. Problems of this type have received ... 
Connect the dot: computing feedlinks for network extension
(20111220)
Article
Open AccessRoad network analysis can require distance from points that are not on the network themselves. We study the algorithmic problem of connecting a point inside a face (region) of the road network to its boundary while ...