`scipy.linalg._flapack:sstemr_lwork`

Signature

def sstemr_lwork(d, e, range, vl, vu, il, iu, compute_v = 1, overwrite_d = 0, overwrite_e = 0)

Query the optimal lwork and liwork for sstemr.

d : ndarray: Diagonal elements of the symmetric tridiagonal matrix, length n.
e : ndarray: Off-diagonal elements in the leading n - 1 entries, length n.
range : int: Which eigenvalues to compute: 0 for all, 1 for those in (vl, vu], 2 for those with indices il through iu.
vl : float: Lower bound of the half-open interval; used only when range is 1.
vu : float: Upper bound of the half-open interval; used only when range is 1.
il : int: Index of the smallest eigenvalue to return, 1-based; used only when range is 2.
iu : int: Index of the largest eigenvalue to return, 1-based; used only when range is 2.
compute_v : int, optional: If nonzero, eigenvectors are computed. Default is 1.
overwrite_d : int, optional: If nonzero, d may be overwritten in place. Default is 0.
overwrite_e : int, optional: If nonzero, e may be overwritten in place. Default is 0.

work : float: Optimal size of the work array, as a scalar of the routine's dtype.
iwork : int: Optimal size of the integer workspace, to pass as liwork.
info : int: 0 on success; if negative, the -info-th argument had an illegal value.