Browsing Departament: Matemàtiques by Keyword "symmetrization"
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First eigenvalue of the Laplacian of a geodesic ball and area-based symmetrization of its metric tensor
Element (2022)Given a Riemmanian manifold, we provide a new method to compute a sharp upper bound for the first eigenvalue of the Laplacian for the Dirichlet problem on a geodesic ball of radius less than the injectivity radius of the ... -
On the symmetrization and composition of nonstandard finite difference schemes as an alternative to Richardson's extrapolation
Taylor and Francis Group (2022-04-29)From the classical explicit Euler scheme of first order, nonstandard finite difference (NSFD) schemes were envisioned to mimic the essential properties of the governing differential equation model for every time step-size. ...