Module problem 

Declarative optimization problem builder.

Author: Moussa Leblouba Date: 5 March 2026 Modified: 2 May 2026

Structs

Constraint

A single constraint with optional gradient.

LinearConstraint

A linear constraint: a^T x {<=, =} b.

OptimProblem

Declarative optimization problem.

Enums

ConstraintKind

Kind of constraint: equality h(x)=0 or inequality g(x)<=0.

ObjectiveKind

Whether the objective is a scalar function or a least-squares residual.

ProblemHint

Hint about problem structure for closure-based objectives.

VarType

Variable type for mixed-integer problems.

Functions

finite_diff_gradient

Compute a finite-difference gradient of f at x using central differences.

finite_diff_jacobian

Compute a finite-difference Jacobian of residual r at x. jac is row-major m*n.

Type Aliases

ScalarFn

Boxed scalar function &[S] -> S.

VectorFn

Boxed vector function (&[S], &mut [S]).