Support jump rate laws in the CLE#1436
Merged
isaacsas merged 7 commits intoSciML:masterfrom Mar 19, 2026
Merged
Conversation
Add `use_jump_ratelaws=false` kwarg to `sde_model`, `hybrid_model`, `SDEProblem`, and `HybridProblem`. When true, CLE noise (diffusion) coefficients use jump rate laws (binomials) instead of ODE rate laws (powers) inside sqrt(|ratelaw|), giving more mathematically correct noise intensity for integer populations. Only affects noise terms, not drift. First-order reactions are identical under both settings. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Directly evaluate Catalyst-generated drift and diffusion functions at multiple state values and compare against hand-coded formulas for both ODE and jump rate law noise. This is deterministic and avoids flaky statistical sampling. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
isaacsas
changed the title
The CLE derived from the CME uses the same stochastic propensity a_j(X) in both drift and diffusion terms. The previous implementation only switched diffusion; this makes the kwarg affect drift too for physical consistency. Also removes the drift_scales hack by widening the assemble_oderhs filter to accept both ODE and SDE scale reactions, adds the kwarg to ode_model/ODEProblem, and adds a statistical test comparing Catalyst output against a hand-coded reference SDE. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
isaacsas
changed the title
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
No description provided.