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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 ...

Domain Decomposition Methods for Problems in H(curl) 

Calvo Alpízar, Juan Gabriel (2015-05)
Two domain decomposition methods for solving vector field problems posed in H(curl) and discretized with Nedelec finite elements are considered. These finite elements are conforming in H(curl). A two-level overlapping ...
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An adaptive choice of primal constrains for BDDC domain decomposition algorithms 

Calvo Alpízar, Juan Gabriel; Widlund, Olof B. (2016-12-12)
An adaptive choice for primal spaces based on parallel sums is developed for BDDC deluxe methods and elliptic problems in three dimensions. The primal space, which forms the global, coarse part of the domain decomposition ...
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The role of short-term immigration on disease dynamics: An SIR model with age-structure
El rol de la inmigración en periodos cortos sobre la dinámica de enfermedades: un modelo sir con estructura de edad 

Sánchez Peña, Fabio Ariel; Calvo Alpízar, Juan Gabriel (2019-02-18)
We formulate an age-structured nonlinear partial differential equation model that features short-term immigration effects in a population. Individuals can immigrate into the population as any of the three stages in the ...
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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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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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On the approximation of a virtual coarse space for domain decomposition methods in two dimensions 

Calvo Alpízar, Juan Gabriel (2018)
A new extension operator for a virtual coarse space is presented which can be used in domain decomposition methods for nodal elliptic problems in two dimensions. In particular, a two-level overlapping Schwarz algorithm is ...
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A two-level overlapping Schwarz method for H(curl) in two dimensions with irregular subdomains 

Calvo Alpízar, Juan Gabriel (2015-10-07)
A bound is obtained for the condition number of a two-level overlapping Schwarz algorithm for problems posed in H(curl) in two dimensions, where the subdomains are only assumed to be John subdomains. The coarse space is ...
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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 BDDC algorithm with deluxe scaling for H(curl) in two dimensions with irregular subdomains 

Calvo Alpízar, Juan Gabriel (2015)
A bound is obtained for the condition number of a BDDC algorithm for problems posed in H(curl) in two dimensions, where the subdomains are only assumed to be uniform in the sense of Peter Jones. For the primal variable ...

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Calvo Alpízar, Juan Gabriel (10)
Widlund, Olof B. (2)Sánchez Peña, Fabio Ariel (1)Typeartículo científico (8)info:eu-repo/semantics/conferenceObject (1)tesis de doctorado (1)ProcedenceVicerrectoría de Investigación (9)Vicerrectoría de Docencia (4)... View MoreHas File(s)No (6)Yes (4)

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