
128
M.W. Berry and S. Varadhan
: AINV (y=Ax)
- 4- AINV (y=A'x) ,;
: BLS2 (y=Ax) ," s
- g- BLS2 (y=A'x)
9 TFAR (y=Ax)
..o --~- TFAR (y=A'x)
~ 100-
I
I
1 ---
----O-
2 " 1 ~ 8
Number of
Singular Triplets
Figure 3: Performance of AINV, BLS2, and TFAR on the 50 • 50 matrix CLUS1 for 10 -3
residual accuracy.
s I
: mNV (y=Ax)
| -4- AINV (y=A'x) /."
| = BLS2 (y=Ax) ~"
/ --- BLS2 (y=A'x) /."
.2~2oo.~ 9 TFAR (y:Ax) /~'"
sssssSSS S
2 4 6 8
Number of Singular Triplets
Figure 4: Performance of AINV, BLS2, and TFAR on the 50 x 50 matrix CLUS2 for 10 -3
residual accuracy.