Increase number of iterations to improve accuracy

Author: jarrodmillman

advanced/scipy_sparse/examples/lobpcg_sakurai.py

@@ -50,7 +50,7 @@ def sakurai(n):
     B,
     tol=1e-6,
     largest=False,
-    maxiter=500,
+    maxiter=2000,
     retResidualNormsHistory=1,
 )
 data.append(time.time() - tt)