Abstract de la publi numéro 14186
In row projection methods, such as Block-Cimmino, the linear dependency between
partitions inﬂuence the spectrum of the iteration matrix. In this talk we show our
approach to break the linear dependency possible such as the spectrum is clustered
around the value 1.
The idea is to permute the matrix such as the partitions are interconnected only
with their neighbours. Next, we extend the matrix such as the partitions in the resulting
superspace are mutually orthogonal to each other making the eigenvalues equal to 1.
We present aslo a less restrictive approach that keeps the advantages of the method.