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Parallel Sums and Adaptive BDDC Deluxe 

Widlund, Olof B.; Calvo Alpízar, Juan Gabriel (2017)
There has recently been a considerable activity in developing adaptive methods for the selection of primal constraints for BDDC algorithms and, in particular, for BDDC deluxe variants. The primal constraints of a BDDC or ...
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An overlapping preconditioner for 2D virtual problems posed in H(rot) with irregular subdomains 

Calvo Alpízar, Juan Gabriel; Herrera Garro, César; Sequeira Chavarría, Filander A. (2022)
We present a two-level overlapping Schwarz preconditioner for problems posed in H(rot) in two dimensions, that extends previous methods for Nédélec elements (triangular meshes) to general polygonal partitions (virtual ...
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A partial differential equation model with age-structure and nonlinear recidivism: Conditions for a backward bifurcation and a general numerical implementation 

Sánchez Peña, Fabio Ariel; Calvo Alpízar, Juan Gabriel; Segura Ugalde, Esteban; Feng, Zhilan (2019-12-15)
We formulate an age-structured three-staged nonlinear partial differential equation model that features nonlinear recidivism to the infected (infectious) class from the temporarily recovered class. Equilibria are computed, ...
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Virtual Coarse Spaces for Irregular Subdomain Decompositions 

Calvo Alpízar, Juan Gabriel (2020-10-25)
On the other hand, Virtual Element Methods (VEM) [1, 12, 13] allow to handle general polygonal elements. In the case of triangular elements, VEM reduces to the usual FEM. Thus, VEM is a natural choice for constructing space ...
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Dengue model with early-life stage of vectors and age-structure within host
Modelo de dengue con etapa temprana en vectores y estructura de edad en el huésped 

Sánchez Peña, Fabio Ariel; Calvo Alpízar, Juan Gabriel (2019-12)
We construct an epidemic model for the transmission of dengue fever with an early-life stage in the vector dynamics and age-structure within hosts. The early-life stage of the vector is modeled via a general function that ...
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An overlapping Schwarz method for virtual element discretizations in two dimensions 

Calvo Alpízar, Juan Gabriel (2019)
A new coarse space for domain decomposition methods is presented for nodal ellipticproblems in two dimensions. The coarse space is derived from the novel virtual elementmethods and therefore can accommodate quite irregular ...
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A new coarse space for overlapping Schwarz algorithms for H(curl) problems in three dimensions with irregular subdomains 

Calvo Alpízar, Juan Gabriel (2019)
A new coarse space for a two-level overlapping Schwarz algorithm is presented for problems posed in three dimensions in the space H(curl, Ω). Previous studies for these methods are very restrictive about the geometry of ...
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A Multilayer Network Model implementation for COVID-19 

Calvo Alpízar, Juan Gabriel; Sánchez Peña, Fabio Ariel; Barboza Chinchilla, Luis Alberto; García Puerta, Yury Elena; Vásquez Brenes, Paola Andrea (2021)
We present a numerical implementation for a multilayer network to model the transmission of Covid-19 or other diseases with a similar transmission mechanism. The model incorporates different contact types between individuals ...
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Mathematical and Statistical models as tools for the control ofmosquito-borne diseases: The experience of Costa Rica 

Sánchez Peña, Fabio Ariel; Barboza Chinchilla, Luis Alberto; Vásquez Brenes, Paola Andrea; García Puerta, Yury Elena; Calvo Alpízar, Juan Gabriel; Chou Chen, Shu Wei; Mery, Gustavo (2021-06-25)
The modeling of infectious diseases provides valuable input in the development of mitigating strategies and implementation of public health interventions. We highlight results and current research conducted in Costa Rica ...
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A numerical implementation for the high-order 2D Virtual Element Method in MATLAB 

Herrera Garro, César; Corrales Barquero, Ricardo; Arroyo Esquivel, Jorge; Calvo Alpízar, Juan Gabriel (2021)
We present a numerical implementation for the Virtual Element Method that in- corporates high order spaces. We include all the required computations in order to assemble the stiffness and mass matrices, and right hand ...
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Calvo Alpízar, Juan Gabriel (21)
Sánchez Peña, Fabio Ariel (9)Barboza Chinchilla, Luis Alberto (4)García Puerta, Yury Elena (4)Vásquez Brenes, Paola Andrea (4)Mery, Gustavo (3)Widlund, Olof B. (3)Herrera Garro, César (2)Pérez Rosales, María Dolores (2)Rivas, Tania (2)... View MoreTypeartículo original (13)artículo preliminar (5)capítulo de libro (1)tesis de maestría (1)tesis doctoral (1)ProcedenceVicerrectoría de Investigación (19)Vicerrectoría de Docencia (14)... View MoreHas File(s)Yes (12)No (9)

  • Repositorios universitarios

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Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.