Let A = (a ij ) R n,n , b R n , with a
Question:
Let A = (aij) ∈ Rn,n, b ∈ Rn, with aii ≠ 0 for every i = 1, . . . , n. The Jacobi method for solving the square linear system Ax = b consists in decomposing A as a sum: A = D + R, where D = diag (a11, . . . , ann), and R contains the off-diagonal elements of A, and then applying the recursion
with initial point
The method is part of a class of methods known as matrix splitting, where A is decomposed as a sum of a “simple,” invertible matrix and another matrix; the Jacobi method uses a particular splitting of A.
1. Find conditions on D, R that guarantee convergence from an arbitrary initial point.
2. The matrix A is said to be strictly row diagonally dominant if
Show that when A is strictly row diagonally dominant, the Jacobi method converges.
Step by Step Answer:
Optimization Models
ISBN: 9781107050877
1st Edition
Authors: Giuseppe C. Calafiore, Laurent El Ghaoui