A modified least action principle allowing mass concentrations for the early universe reconstruction problem

Our method uses the geometrical properties of the vector field given by the ODE and a state space discretization to compute an enclosure of the trajectories set that verifies the

In Section 3 we revisit the semi- discrete in time approximation of [10] and we improve some results, for example we prove uniform L ∞ bounds for the solutions of the

Because this problem is an NP- hard problem there is not a known deterministic efficient (polinomial) method. Non- deterministic methods are in general more efficient but an

Our convergence proof takes a fairly standard path, namely a priori estimates on the space semi-discrete solutions and compactness arguments, but the mass modification at the

Keywords: Finite volume method - High order method - k-exact method - Cubic reconstruction - Numerical flux - Linear stability - Irregular grid - Coupled Least Squares.. Finite

Our method uses the geometrical properties of the vector field given by the ODE and a state space discretization to compute an enclosure of the trajectories set that verifies the

Abstract- An approximate direct method for solving linear and nonlinear heat conduction problems, based on the Gauss's principle of least constraint is

On one hand, the dis- cretization of the pressure gradient term is built as the discrete transposed of the velocity divergence term, the latter being evaluated using a natural