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

Algorithm 7.

(1) Choose matrix such that for

(2) For Do

(3)  Set

(4)  Compute

(5)  For Do

(6)   

(7)   

(8)  endDo

(9)  Compute

(10)  If stop

(11)  Compute

(12)  

(13)  

(14) End