Struct DynamicTwoSeed 

pub struct DynamicTwoSeed<'arena> {
    pub base: DynamicOrder2<'arena>,
    pub eps: DynamicOrder2<'arena>,
    pub del: DynamicOrder2<'arena>,
    pub eps_del: DynamicOrder2<'arena>,
}

Runtime-sized two-seed scalar for a Hessian-contracted fourth derivative.

Fields

base: DynamicOrder2<'arena>

Base value/gradient/Hessian channels.

eps: DynamicOrder2<'arena>

Nilpotent epsilon coefficient.

del: DynamicOrder2<'arena>

Nilpotent delta coefficient.

eps_del: DynamicOrder2<'arena>

Mixed epsilon delta coefficient.

Implementations

impl<'arena> DynamicTwoSeed<'arena>

pub fn seed( x: f64, axis: usize, u_axis: f64, v_axis: f64, dimension: usize, arena: &'arena DynamicJetArena, ) -> Self

Seed one primary with both contraction direction components.

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

Row-major contracted-fourth matrix.

Trait Implementations

impl<'arena> Clone for DynamicTwoSeed<'arena>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'arena> Copy for DynamicTwoSeed<'arena>

impl<'arena> Debug for DynamicTwoSeed<'arena>

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

Formats the value using the given formatter.

impl<'arena> RuntimeJetScalar<'arena> for DynamicTwoSeed<'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.