Struct LanczosParams 

pub struct LanczosParams {
    pub max_iter: usize,
    pub tol: f64,
    pub seed: Option<u64>,
}

Parameters controlling the Lanczos iteration.

Fields

max_iter: usize

Maximum number of Lanczos iterations. Capped internally at dim.

tol: f64

Convergence tolerance, interpreted as the corresponding T::Real.

Used in two places: (1) the iteration loop exits as soon as the cheap Lanczos residual estimate beta_j * |z[m-1]| falls at or below tol, and (2) the returned LanczosResult::converged flag is set from the true residual ||H psi - lambda psi||_2 against the same tol, so the flag is consistent with the residual the caller sees.

seed: Option<u64>

Optional seed for the initial vector. None draws from the OS RNG.

Trait Implementations

impl Clone for LanczosParams

fn clone(&self) -> LanczosParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LanczosParams

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

Formats the value using the given formatter.

impl Default for LanczosParams

fn default() -> Self

Returns the “default value” for a type.

impl From<LanczosParams> for LocalEigensolverParams

fn from(p: LanczosParams) -> Self

Converts to this type from the input type.