Indefinite Ruhe’s Variant of the Block Lanczos Method for Solving the Systems of Linear Equations

Algorithm 2.

Block Arnoldi-Ruhe’s variant.

(1) Choose initial vectors

(2) For Do

(3)  Set

(4)  Compute

(5)  For Do

(6)   

(7)   

(8)  EndDo

(9)  Compute and

(10) EndDo