03/06/2019
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SIMBa: On an efficient implementation of the Roe scheme for large hyper-bolic systems

El proper dimecres, 5 de juny, se celebrarà una nova xerrada del Seminari Informal de Matemàtiques de Barcelona (SIMBa).

Speaker: Ernesto Pimentel García
Universitat: Universidad de Málaga

Data: Dimecres, 5 de juny de 2019
Hora: 12:00, cafè; 12:20, xerrada
Lloc: Aula B1 Facultat de Matemàtiques de la Universitat de Barcelona.
Idioma: Anglès

Títol: On an efficient implementation of the Roe scheme for large hyper-bolic systems
Resum: There exist several schemes to solve numerically hyperbolic sys-tems of Partial Differencial Equations. Two of them are the Sim-ple Riemann solvers (SRS) and the Polynomial Viscosity matrix(PVM) methods.
The results obtained by Morales de Luna et al. (2014) concerningthe relation between SRS and the PVM methods are revisited andapplied to the efficient implementation of the Roe method for largehyperbolic systems either conservative or non-conservative. Thisimplementation, based on the Newton’s form of the interpolationpolynomial, will be applied to the two-layer shallow water modeland a non-conservative model for rarefied gas flow.

Si voleu estar al cas de les xerrades previstes, podeu consultar el calendari. Si voleu proposar una xerrada, ompliu el formulari. Si voleu contactar amb els responsables podeu escriure un missatge a seminari(dot)simba(at)ub(dot)edu.

31/05/2019
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Novetats del fons: segona quinzena de maig

Compra

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301399

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301462

: https://cercabib.ub.edu/iii/encore/record/C__Rb2302224

: https://cercabib.ub.edu/iii/encore/record/C__Rb2302243

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301679

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301966

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301952

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301831

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301855

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301956

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301689

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301924

Donatiu

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301970

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301960

: https://cercabib.ub.edu/iii/encore/record/C__Rb2273735

: https://cercabib.ub.edu/iii/encore/record/C__Rb2302448

: https://cercabib.ub.edu/iii/encore/record/C__Rb2302476

17/05/2019
by blocmat Deixa un comentari

SIMBa: On a theorem of Waring for plane algebraic curves

El proper dimecres, 22 de maig, se celebrarà una nova xerrada del Seminari Informal de Matemàtiques de Barcelona (SIMBa).

Speaker: Andrés Rojas González
Universitat: Universitat de Barcelona

Data: Dimecres, 22 de maig de 2019
Hora: 12:00, cafè; 12:20, xerrada
Lloc: Aula B1 Facultat de Matemàtiques de la Universitat de Barcelona.
Idioma: Anglès

Títol: On a theorem of Waring for plane algebraic curves
Resum: Waring’s theorem is a classic result about the intersection of plane algebraic curves. Roughly speaking, it asserts that the barycenter of the intersection points is determined by the asymptotes of the curves.
After a short historical introduction, in this talk we present the ideas that allow to obtain an extension of Waring’s theorem. Finally, we see some consequences; the most important of them will be a theorem due to Chasles.

15/05/2019
by blocmat Deixa un comentari

Novetats del fons: primera quinzena de maig

Compra

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300683

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300934

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300902

: https://cercabib.ub.edu/iii/encore/record/C__Rb2299514

Subscripció

$The mathematics of shock reflection-diffraction and von Neumann's conjectures$: https://cercabib.ub.edu/iii/encore/record/C__Rb2300805

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300997

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300718

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300717

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300800

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300801

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300614

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300708

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300704

: https://cercabib.ub.edu/iii/encore/record/C__Rb2300607

Donatiu

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301012

: https://cercabib.ub.edu/iii/encore/record/C__Rb2301002

06/05/2019
by blocmat Deixa un comentari

SIMBa: Algebraic versus semi-algebraic conditions for phylogenetic varieties

El proper dimecres, 8 de maig, se celebrarà una nova xerrada del Seminari Informal de Matemàtiques de Barcelona (SIMBa).

Speaker: Marina Garrote López
Universitat: Universitat Politècnica de Catalunya

Data: Dimecres, 8 de maig de 2019
Hora: 12:00, cafè; 12:20, xerrada
Lloc: Aula B1 Facultat de Matemàtiques de la Universitat de Barcelona.
Idioma: Anglès

Títol: Algebraic versus semi-algebraic conditions for phylogenetic varieties
Resum: It is well known that there exists a close relationship between Phylogenetics and Algebraic Geometry. It is common to modelevolution adopting a parametric statistical model which allowsto define a joint probability distribution at the leaves of the trees. When these models are algebraic, one is able to deduce polynomial relationships between these probabilities, and the study of these polynomials and the geometry of the algebraic varieties that arisefrom them can be used to reconstruct phylogenetic trees. However not every point in this algebraic varieties has biological sense. In this talk we would like to discuss the importance of studying the subset of these varieties with biological sense and explore the extent to which restricting to these subsets can provide insight into existent methods of phylogenetic reconstruction.