Struct SdeOptions 

pub struct SdeOptions<S: Scalar> {
    pub dt: S,
    pub rtol: S,
    pub atol: S,
    pub dt_max: S,
    pub dt_min: S,
    pub max_steps: usize,
    pub save_trajectory: bool,
    pub seed: Option<u64>,
}

Options for SDE solvers.

Divergence from numra_ode::SolverOptions (per Foundation Spec §2.5): SDE solvers carry stochastic noise, so step size also controls the Wiener increment δW ~ N(0, h) — not just truncation accuracy. The fixed dt field is distinguished from rtol / atol (used by adaptive SRA-family methods) rather than collapsed onto a shared h0 / h_max, because the noise-discretisation interpretation matters at every step. seed: Option<u64> is required for reproducibility — deterministic ODE configuration has no analog. save_trajectory: bool toggles trajectory-vs-final-only collection for Monte Carlo workloads where intermediate states aren’t kept. See docs/architecture/foundation-specification.md §2.5.

Fields

dt: S

Fixed time step (for non-adaptive methods)

rtol: S

Relative tolerance (for adaptive methods)

atol: S

Absolute tolerance (for adaptive methods)

dt_max: S

Maximum time step

dt_min: S

Minimum time step

max_steps: usize

Maximum number of steps

save_trajectory: bool

Save solution at all steps (vs. just final)

seed: Option<u64>

Random seed (None = use system entropy)

Implementations

impl<S: Scalar> SdeOptions<S>

pub fn dt(self, dt: S) -> Self

Set fixed time step.

pub fn rtol(self, rtol: S) -> Self

Set relative tolerance.

pub fn atol(self, atol: S) -> Self

Set absolute tolerance.

pub fn dt_max(self, dt_max: S) -> Self

Set maximum time step.

pub fn seed(self, seed: u64) -> Self

Set random seed for reproducibility.

pub fn save_trajectory(self, save: bool) -> Self

Enable/disable trajectory saving.

Trait Implementations

impl<S: Clone + Scalar> Clone for SdeOptions<S>

fn clone(&self) -> SdeOptions<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + Scalar> Debug for SdeOptions<S>

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

Formats the value using the given formatter.

impl<S: Scalar> Default for SdeOptions<S>

fn default() -> Self

Returns the “default value” for a type.