Click here to flash read.
In this paper, we describe and analyze the spectral properties of a number of
exact block preconditioners for a class of double saddle point problems. Among
all these, we consider an inexact version of a block triangular preconditioner
providing extremely fast convergence of the FGMRES method. We develop a
spectral analysis of the preconditioned matrix showing that the complex
eigenvalues lie in a circle of center (1,0) and radius 1, while the real
eigenvalues are described in terms of the roots of a third order polynomial
with real coefficients. Numerical examples are reported to illustrate the
efficiency of inexact versions of the proposed preconditioners, and to verify
the theoretical bounds.
Click here to read this post out
ID: 243160; Unique Viewers: 0
Unique Voters: 0
Total Votes: 0
Votes:
Latest Change: July 4, 2023, 7:33 a.m.
Changes:
Dictionaries:
Words:
Spaces:
Views: 29
CC:
No creative common's license
No creative common's license
Comments: