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sparse_eig_smallest

oxiphysics_core::sparse::functions

Function sparse_eig_smallest 

Source 
pub fn sparse_eig_smallest(
    a: &CsrMatrix,
    tol: f64,
    max_iter: usize,
) -> Option<(f64, Vec<f64>)>
Expand description

Compute the smallest eigenvalue of a sparse SPD matrix using inverse iteration (shift-and-invert with the ILU preconditioner).

Returns (eigenvalue, eigenvector) or None if not converged.