Struct ContractionOptions 

pub struct ContractionOptions {
    pub method: ContractionMethod,
    pub max_rank: Option<usize>,
    pub svd_policy: Option<SvdTruncationPolicy>,
    pub qr_rtol: Option<f64>,
    pub nfullsweeps: usize,
    pub convergence_tol: Option<f64>,
    pub factorize_alg: FactorizeAlg,
}

Options for the generic contract function.

Fields

method: ContractionMethod

Contraction method to use.

max_rank: Option<usize>

Maximum bond dimension (optional).

svd_policy: Option<SvdTruncationPolicy>

Explicit SVD truncation policy (optional).

qr_rtol: Option<f64>

QR-specific relative tolerance (optional).

nfullsweeps: usize

Number of full sweeps for Fit method.

A full sweep visits each edge twice (forward and backward) using an Euler tour.

convergence_tol: Option<f64>

Convergence tolerance for Fit method (None = fixed sweeps).

factorize_alg: FactorizeAlg

Factorization algorithm for Fit method.

Implementations

impl ContractionOptions

pub fn new(method: ContractionMethod) -> Self

Create options with specified method.

pub fn zipup() -> Self

Create options for zipup contraction.

pub fn fit() -> Self

Create options for fit contraction.

pub fn with_max_rank(self, max_rank: usize) -> Self

Set maximum bond dimension.

pub fn with_svd_policy(self, policy: SvdTruncationPolicy) -> Self

Set the SVD truncation policy.

pub fn with_qr_rtol(self, rtol: f64) -> Self

Set the QR-specific relative tolerance.

pub fn with_nfullsweeps(self, nfullsweeps: usize) -> Self

Set number of full sweeps for Fit method.

pub fn with_convergence_tol(self, tol: f64) -> Self

Set convergence tolerance for Fit method.

pub fn with_factorize_alg(self, alg: FactorizeAlg) -> Self

Set factorization algorithm for Fit method.

Trait Implementations

impl Clone for ContractionOptions

fn clone(&self) -> ContractionOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContractionOptions

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

Formats the value using the given formatter.

impl Default for ContractionOptions

fn default() -> Self

Returns the “default value” for a type.