Add diffop module and bump to v0.3.0#26
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gvonness-apolitical merged 1 commit intomainfrom Feb 25, 2026
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Add arbitrary differential operator evaluation via jet coefficient extraction. The diffop module enables computing any mixed partial derivative of a recorded tape through a single forward pushforward per group of active variables, using the multivariate Faà di Bruno formula. Key additions: - MultiIndex type for specifying mixed partial derivatives - JetPlan for precomputed slot assignments (plan once, evaluate many) - eval_dyn for evaluating plans at arbitrary points via TaylorDyn - mixed_partial and hessian convenience functions - Prime window sliding for collision-free slot assignment - Pushforward grouping to avoid slot contamination Includes 23 integration tests, Criterion benchmarks, and documentation updates across README, CHANGELOG, algorithms.md, and crate-level docs.
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Summary
diffopmodule: arbitrary mixed partial derivative evaluation via jet coefficient extraction (Faà di Bruno formula)MultiIndex,JetPlan,eval_dyn,mixed_partial,hessianTest plan
cargo test --workspace --features "bytecode,taylor,laurent,stde,serde,diffop"— all tests passcargo clippy --features "diffop" -- -D warnings— cleancargo fmt --all -- --check— cleandiffop::hessianmatchestape.hessian()on Rosenbrock at multiple points