The (equation) solver “cracks” the sometimes enormous system of equations which is behind a FEM-model. Equation systems with **10 million equations** and more are not unimaginable and also not unsolvable. Of course the solving of that large systems requires a great amount of time and is not always necessary. If it is, the calculation time can be reduced significantly by **applying some tricks**. For example, a FE-calculation can be accelerated by including the boundary conditions during the saving of the total stiffness matrix or the parallel computing on several CPUs.

The first result of a solver always contains the **displacements** of the single nodes. In the next step **distortions, stresses and nodal forces** can be calculated. Besides mechanical quantities, also thermic, electric or magnetic quantities can be calculated if correspondingly a thermic or electromagnetic solver is used. At the end of a calculation, the results are forwarded to the post-processor of the FE-program.