Enum StabilizationKind 

pub enum StabilizationKind {
    None,
    SolverDampingOnly,
    NumericalPerturbation {
        backward_error_bound: Option<f64>,
    },
    ExplicitPrior,
}

Three semantically distinct flavours a ridge δ can have.

Variants

None

SolverDampingOnly

LM/TR damping. NEVER enters the objective, gradient, logdet, Hessian, or any saved model artifact. Lives only inside the trust-region step.

NumericalPerturbation

Added strictly so a linear solve succeeds. The objective/Hessian the caller sees is unchanged; the perturbation is a property of the solver, not the model. backward_error_bound is the max change to the solution norm imputable to the perturbation, when known.

Fields

backward_error_bound: Option<f64>

ExplicitPrior

Part of the model. Enters quadratic, log normalizer, Hessian, serialization, and user-visible summaries.

Trait Implementations

impl Clone for StabilizationKind

fn clone(&self) -> StabilizationKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StabilizationKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StabilizationKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for StabilizationKind

fn eq(&self, other: &StabilizationKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for StabilizationKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for StabilizationKind

impl StructuralPartialEq for StabilizationKind