Fix eigen
fix 2 problems in fullMatrix with eigen. NB: the difference between fullMatrix::add and fullMatrix::axpy is no clear to me but I noticed that add is using eigen whil axpy is not. Maybe axpy could simply call add?
fix 2 problems in fullMatrix with eigen. NB: the difference between fullMatrix::add and fullMatrix::axpy is no clear to me but I noticed that add is using eigen whil axpy is not. Maybe axpy could simply call add?