Error analysis 27 error analysis 15 Finite element method 9 Problem solving 6 Interpolation 5 Mathematical models 5 numerical model 5 Approximation theory 4 Argentina 4 Computer simulation 4 Eigenvalues and eigenfunctions 4 Estimation 4 Finite elements 4 South America 4 data assimilation 4 weather forecasting 4 A posteriori error estimates 3 A-posteriori error estimates 3 Errors 3 Graded meshes 3 Least squares approximations 3 Linear regression 3 Parameter estimation 3 Regression analysis 3 Remote sensing 3 Weather forecasting 3 article 3 ensemble forecasting 3 satellite imagery 3 Algorithms 2