Module psi_terms 

Exact-Newton joint-ψ term carriers and the joint-ψ workspace trait.

These ψ-hyperparameter term types and the ExactNewtonJointPsiWorkspace trait are neutral carriers in the criterion contract: they reference only HyperOperator / DriftDerivResult (defined in this crate) and ndarray arrays, so gam-problem is their public namespace.

Structs

ExactNewtonJointPsiSecondOrderContracted

Direction-contracted second-order ψ terms for the profiled θ-HVP (#740).

ExactNewtonJointPsiSecondOrderTerms

ExactNewtonJointPsiTerms

Traits

ExactNewtonJointPsiWorkspace

Functions

per_axis_psi_hessian_directional_derivatives

Assemble the coefficient-axis tensor from exact directional derivatives. A missing axis makes the whole tensor unavailable; errors propagate intact.