This package provides methods for solving problems by adaptive FEM.
Observe an estimate of the global error.
Standard observe quantities for fe approximation.
Observe entries for the size of the matrix.
Contains the model time during the iteration for use in coefficient functions.
Standard observe quantities for Rothe.
Standard observe quantities for stationary finite element strategies.
cell-rule on a cell for determinining its refinement rule.
Estimates the error by testing the difference z-IPz against the residual. Here z is the solution of a dual problem in an enriched finite element space.
Superclasses: <SETUP-ENRICHED-ANSATZ-SPACE> <SOLVE-DUAL-PROBLEM> <LOCAL-TEST-WITH-DUAL> <STANDARD-ERROR-ESTIMATOR>
This class describes iterative finite element appoximation strategies.
This class implements adaptive finite element interpolation of the given coefficient function as a variant of finite element approximation.
Puts the fraction of the cells with the largest error contributions in the refinement table. Note that a fraction of 1.0 yields uniform refinement.
Estimates the error by measuring the difference between the solution and a projected solution in a hierarchical mesh by a certain norm given by local-p and global-p.
Superclasses: <DIFFERENCE-WITH-PROJECTION> <GLOBAL-AND-LOCAL-NORM> <STANDARD-ERROR-ESTIMATOR>
An error indicator can appear as first argument in the
indicate which works on a blackboard. Often, it will use
quantities computed by an error estimator before.
Rothe strategy for time-dependent problems. The idea of the Rothe method for solving U_t +A U =f is to do an ODE time-stepping scheme in an infinite-dimensional function space. Therefore, in every time-step, the solution has to be approximated sufficiently well in the space variable.
This class describes some iterative finite element solution strategies for continuous, stationary PDE problems.
A strategy is an iteration for solving a problem defined on a blackboard.
Marks all cells for refinement.
Yields both local and global estimate.
Puts a list of cells to be refined on the blackboard.
Generates an observer triple which observes the value of component component of solution number index at the position position.