Note that C is a dense matrix and the default preconditioner
constructed by eigifp is the (complete) [LDL.
Also in finite dimensions it is often preferred to keep the preconditioner
explicit rather than to merge it with the system matrix.
More precisely, we introduce an efficient and robust preconditioner
to accelerate the convergence of a Krylov subspace method.
We consider these problems using fundamental saddle point theory and explain how it is possible to use this to construct preconditioners
for the Stokes control problem using a Poisson control preconditioner
along with a commutator argument, the concept of which we shall describe.
The CRH tester features RH control through the use of an innovative air preconditioner
Introducing a preconditioner
when using high purity charge material.
The chosen solver has been the Generalized Minimal RESidual algorithm for solving nonsymmetric linear systems, GMRES (Saad and Schultz 1986); the preconditioner
used in the simulations was the Geometric Multigrid one, which allows it to accelerate the convergence of the base iterative method by correcting, from time to time, the solution globally by solving a coarse problem.
Also treat the wood before applying the stain with a wood preconditioner
Since the coefficient c is equal to a constant co except on edges, then the discrete cosine transform is a good preconditioner
for the conjugate gradient method.
Overhead, the holding platform supports mounting of a preconditioner
or other ancillary equipment.
Instead of applying a drum precooker, an existing Buhler preconditioner
was modified and integrated in the Multigrain process.
Level checks are made on each piece of equipment--hot places; hot plate entry idler rolls; glue machine; preheater drum, wrap and fixed idler rolls; bridge guide idler rolls; single facers; preconditioner
drum, wrap and fixed idler rolls, and roll stands, core chucks.