Struct JacobiPreconditioner 

pub struct JacobiPreconditioner<T: Float> { /* private fields */ }

Jacobi (diagonal) preconditioner for sparse iterative solvers.

Stores the reciprocal of each diagonal element of the matrix. When a diagonal entry is zero, the corresponding inverse is set to one (identity fallback) to avoid division by zero.

Implementations

impl<T: Float> JacobiPreconditioner<T>

pub fn new(a: &CsrMatrix<T>) -> Self

Create from a sparse matrix (extracts and inverts diagonal).

Zero diagonal entries are treated as ones to prevent division by zero.

pub fn apply(&self, r: &[T]) -> Vec<T>

Apply preconditioner: z = M^{-1} r (element-wise multiply by inverse diagonal).

Trait Implementations

impl<T: Clone + Float> Clone for JacobiPreconditioner<T>

fn clone(&self) -> JacobiPreconditioner<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Float> Debug for JacobiPreconditioner<T>

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

Formats the value using the given formatter.