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Line 116: [[Schur complement]]s of diagonal blocks and combining both using the matrix-matrix multiplication. In a similar way, the [[LU decomposition]] <ref name="BE07">{{cite journal\|last=Bebendorf\|first=Mario\|date=2007\|title=Why finite element discretizations can be factored by triangular hierarchical matrices\|journal=SIAM J. ~~Num~~Numer. Anal.\|volume=45\|issue=4\|pages=1472–1494\|doi=10.1137/060669747}}</ref> <ref name="GRKRBO09">{{cite journal\|last=Grasedyck\|first=Lars\|last2=Kriemann\|first2=Ronald\|last3=Le Borne\|first3=Sabine\|date=2009\|title=Domain decomposition based H-LU preconditioning\|journal=Num. Math.\|volume=112\|issue=4\|pages=565–600\|doi=10.1007/s00211-009-0218-6}}</ref> can be constructed using only recursion and multiplication.

Hierarchical matrix: Difference between revisions