CHANGELOG.md

Revision history for agate

0.2.0.0 -- 2026-03-18

Stochastic simulation

• Stochastic interpretation of Petri nets via the Gillespie algorithm
• Markov kernel abstraction using LazyPPL
• Convergence testing against deterministic ODE solutions
• Verification of P-invariants for stochastic trajectories

General ODE systems

• Real-valued ODE system type class, not restricted to polynomials
• Double pendulum and Rossler attractor examples

0.1.0.0

Petri nets

• Core Petri net representation using sets for places and transitions
• Mass action semantics for deriving ODE systems from Petri nets
• GraphViz-based diagram generation with configurable layout options
• Animated SVG diagrams showing population dynamics over time
• Epidemiological model examples: SIR, SIS, SIRS, SIRD, SEIR, SEAIR, SIWR, Malthusian, and Lotka-Volterra

ODE solving

• Polynomial ODE systems with mass action translation from Petri nets
• Euler method solver
• Stacked area charts and animated diagrams for visualising solutions

Oriented graded posets

• OG-poset representation and validation
• Enumeration of closed subsets
• Verification of algebraic identities (Lemma 16, formula 14.2)

Idealized Algol

• Basic interpreter for an idealized Algol-like language