Enum OuterHessianMaterialization 

pub enum OuterHessianMaterialization {
    Unavailable,
    RepeatedHvp,
    BatchedHvp,
    Explicit,
}

Exact dense-materialization route exposed by an outer Hessian operator.

The optimizer uses this as a work-model contract before turning a matrix-free analytic Hessian into a dense ARC model. Unavailable means callers must stay matrix-free; the remaining variants are all analytic but differ in how much per-column HVP overhead they imply.

Variants

Unavailable

Dense materialization is not part of this operator’s contract.

RepeatedHvp

Materialization is exact but implemented by cheap repeated HVP probes.

BatchedHvp

Materialization is exact and can apply many HVP directions together.

Explicit

Materialization is exact and can be assembled without basis probing.

Implementations

impl OuterHessianMaterialization

pub fn is_available(self) -> bool

Trait Implementations

impl Clone for OuterHessianMaterialization

fn clone(&self) -> OuterHessianMaterialization

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OuterHessianMaterialization

impl Debug for OuterHessianMaterialization

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

Formats the value using the given formatter.

impl Eq for OuterHessianMaterialization

impl PartialEq for OuterHessianMaterialization

fn eq(&self, other: &OuterHessianMaterialization) -> 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 StructuralPartialEq for OuterHessianMaterialization