Release for preconditioning manuscript

Code used in "Preconditioners for computing multiple solutions in three-dimensional fluid topology optimization", I.P.A Papadopoulos, P.E. Farrell, 2022.

Thesis Corrections

Release of fir3dab as used in Chapter 5 after corrections.

Thesis Chapter 5

Second release of fir3dab as used in Chapter 5 of the PhD thesis of Ioannis Papadopoulos.

First release of fir3dab

First release of fir3dab. The current example is preconditioning the linear systems in a 2D double-pipe in order to test the convergence of a BDM discretization.