Struct HermitianKrylovExpmOptions 

pub struct HermitianKrylovExpmOptions {
    pub max_iter: usize,
    pub max_time_splits: usize,
    pub tol: f64,
    pub breakdown_tol: f64,
    pub hermitian_tol: f64,
    pub verbose: bool,
}

Options for hermitian_krylov_expm_multiply.

The routine builds a Hermitian Lanczos basis for a matrix-free operator, exponentiates the small projected Hermitian matrix, and combines the basis vectors without materializing the full operator. Scalar convergence checks and projected eigendecompositions are explicit non-differentiable boundaries; vector-space tensor operations preserve backend metadata when the underlying tensor implementation supports it.

Examples

use tensor4all_core::krylov::HermitianKrylovExpmOptions;

let options = HermitianKrylovExpmOptions {
    max_iter: 32,
    tol: 1.0e-10,
    ..HermitianKrylovExpmOptions::default()
};
assert_eq!(options.max_iter, 32);
assert_eq!(options.tol, 1.0e-10);

Fields

max_iter: usize

Maximum Krylov subspace dimension for one exponential application.

max_time_splits: usize

Maximum number of equal time splits attempted after non-convergence.

tol: f64

Relative convergence tolerance for the Krylov residual estimate.

breakdown_tol: f64

Breakdown threshold for zero vectors and invariant Krylov subspaces.

hermitian_tol: f64

Hermitian validation tolerance for projected matrices.

verbose: bool

Whether to print per-attempt diagnostics.

Trait Implementations

impl Clone for HermitianKrylovExpmOptions

fn clone(&self) -> HermitianKrylovExpmOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HermitianKrylovExpmOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for HermitianKrylovExpmOptions

fn default() -> Self

Returns the “default value” for a type.