TY  - JOUR
AU  - Jan Mandel
TI  - On block diagonal and Schur complement preconditioning.
JO  - Numerische Mathematik
PY  - 1990
SP  - 79
EP  - 94
VL  - 58
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NUMA_1990__58_5_133488/
ID  - NUMA_1990__58_5_133488
ER  -