Joachim Schöberl, Walter Zulehner,
"Symmetric Indefinite Preconditioners for Saddle Point Problems with Applications to PDE-Constrained Optimization Problems"
, in SIAM Journal on Matrix Analysis and Applications, Vol. 29, Nummer 3, Seite(n) 752 - 773, 2007, ISSN: 1095-7162
Original Titel:
Symmetric Indefinite Preconditioners for Saddle Point Problems with Applications to PDE-Constrained Optimization Problems