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call dsaupd ( ido, bmat, n, which, nev, tol, resid,
     &                 ncv, v, ldv, iparam, ipntr, workd, workl,
     &                 lworkl, info )
call HMATRIX(workd(ipntr(1)), workd(ipntr(2)))
call dseupd ( rvec, 'All', select, d, v, ldv, sigma,
     &         bmat, n, which, nev, tol, resid, ncv, v, ldv,
     &         iparam, ipntr, workd, workl, lworkl, ierr )
call HMATRIX(v(1,j),ax)
call daxpy(n, -d(j,1), v(1,j), 1, ax, 1)
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