Struct DynamicOrder2 

pub struct DynamicOrder2<'arena> {
    pub v: f64,
    pub g: &'arena [f64],
    pub h: &'arena [f64],
    /* private fields */
}

Runtime-sized packed second-order scalar: value, gradient, and a row-major Hessian. Storage is O(K^2) in the row’s actual primary dimension and comes from the row’s reusable DynamicJetArena.

Fields

v: f64

Value channel.

g: &'arena [f64]

Gradient channel.

h: &'arena [f64]

Row-major Hessian channel.

Implementations

impl DynamicOrder2<'_>

pub fn g(&self) -> &[f64]

Gradient channel.

pub fn h(&self) -> &[f64]

Row-major Hessian channel.

pub fn h_at(&self, row: usize, col: usize) -> f64

Hessian entry (row, col).

Trait Implementations

impl<'arena> Clone for DynamicOrder2<'arena>

fn clone(&self) -> DynamicOrder2<'arena>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'arena> Copy for DynamicOrder2<'arena>

impl<'arena> Debug for DynamicOrder2<'arena>

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

Formats the value using the given formatter.

impl<'arena> RuntimeJetScalar<'arena> for DynamicOrder2<'arena>

type Workspace = DynamicJetArena

Storage arena used by runtime-backed scalars. Fixed derivative oracles use the unit type because their storage is inline.

fn constant(c: f64, dimension: usize, arena: &'arena DynamicJetArena) -> Self

A constant in a dimension-primary algebra.

fn variable( x: f64, axis: usize, dimension: usize, arena: &'arena DynamicJetArena, ) -> Self

A seeded variable in a dimension-primary algebra.

fn dimension(&self) -> usize

Number of primary derivative axes carried by this scalar.

fn value(&self) -> f64

Value channel.

fn add(&self, o: &Self) -> Self

Exact truncated sum.

fn sub(&self, o: &Self) -> Self

Exact truncated difference.

fn mul(&self, o: &Self) -> Self

Exact truncated product.

fn neg(&self) -> Self

Negate every channel.

fn scale(&self, s: f64) -> Self

Scale every channel.

fn compose_unary(&self, d: [f64; 5]) -> Self

Exact unary composition from the certified derivative stack.

fn exp(&self) -> Self

e^self.

fn recip(&self) -> Self

1/self.