who uses them anyway ?

It uses the Taylor-Galerkin scheme.
The non-linear functions of the blood flow model are implemented (not yet tested). The scheme has been tested so far in the linear case.
It is still on-going work, but a stage has been reached.

* translated non-english comments to english

* added MSRMatr::operator= for conversion from CSRMatr (code from former
  version of the function CSRmat2MSRmat)
* added (implemented) conversion copy constructor from CSRMatr
* generalized function CSRmat2MSRmat left in for backward compatibility
* unified changed get_value functions in return type

* use simpler setMatrix() method for SolverPETSC
* prepared everything to make test fail also in the case of a solver
  that does not converge

  because the implementation does not exist!
* adapted comments about use of CSRmat2MSRmat to reality and made available
  in API documentation

of a nonlinear system of equation.
The aim is to use methods deriving from domain decomposition and apply them to
a soupled non-linear system.

the class generalizedAitken is used by noLinRichardson to determine the
relaxation parameter. It is wrote in general form, even if it still lack of
some codelines for the real general case. Should work for nonLinRichardson.

   LifeV::StaticBdFE::invArea'

finalizing PETSc automatically. Should be reworked more cleanly...

* renamed PETSCforSingleton to PETSC and moved GetPot functionality to above
  function
* make use of singleton pattern

* replaced implementation of CSRMatr::diagonalize_row(...)
* improved documentation