Struct KktReport 

pub struct KktReport {
    pub iter: i32,
    pub dim: i32,
    pub n_neg: i32,
    pub n_pos: i32,
    pub expected_neg: i32,
    pub provides_inertia: bool,
    pub inertia_correct: bool,
    pub delta_w: Number,
    pub delta_c: Number,
    pub status: String,
}

KKT-factorization report (see DebugState::kkt). The inertia of a well-posed primal-dual system is (n_pos = n, n_neg = m, n_zero = 0); a mismatch (or nonzero regularization) is the classic signal that the step is being stabilized.

Fields

iter: i32

The outer iteration this factorization was assembled at — may be the previous iteration when paused at iter_start (viz look-back).

dim: i32

Augmented-system dimension (n + m).

n_neg: i32

Negative eigenvalues reported (-1 if the backend has no inertia).

n_pos: i32

Positive eigenvalues = dim − n_neg (-1 if unknown).

expected_neg: i32

Expected negatives = number of equality + inequality multipliers.

provides_inertia: bool

Whether the backend reports inertia.

inertia_correct: bool

true when reported inertia matches the expected (n, m, 0).

delta_w: Number

Primal regularization δ_w applied to the (1,1) block.

delta_c: Number

Dual regularization δ_c applied to the (3,3)/(4,4) blocks.

status: String

Factorization status (debug string).

Trait Implementations

impl Clone for KktReport

fn clone(&self) -> KktReport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KktReport

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

Formats the value using the given formatter.