FORTRAN SOFTWARE CATALOG

Repository owner: Nick Wogan (nicholaswogan)

odepack

Modern thread-safe interfaces to the LSODA and LSODAR initial-value ODE solvers.

Repository · Pinned source (d5db96093dc1) · Try in playground · Checked package example

GAMS classifications

About this package

Category
Differential equations
License
Public Domain

Topics: event-detection, fortran-package-manager, initial-value-problems, ode, ode-solver, odepack, stiff-equations, thread-safe

Package dependencies

Resolved GitHub repositories used by the verified playground build, combining direct and indirect dependencies. This list does not describe internal module dependencies or native system libraries.

Required by this build

No additional GitHub package dependencies were recorded for this verified build.

Build record verified 2026-10-28.

Used by (0 selected packages)

No other selected build records this repository as a dependency. This is not a measure of usage outside the catalog.

Reviewed procedures

These mappings have pinned source evidence. A checked package example may exercise only some of them; source review is not a numerical benchmark.

lsoda_class%integrate

Module: odepack_mod

I1a2

I1a2: verified

Derivatives / callbacks: optional user Jacobian; internal approximation supported

Automatic switching between Adams and BDF; classify stiff capability here without claiming all ODEPACK methods. The checked I1a2 driver solves the shared autonomous system y1'= -1000*y1+999*y2, y2'= -y2 from [2,1], checking exact exponential modes at four output times. Only this stiff ODE configuration is verified; no DAE capability or general stiff-problem accuracy is established.

Pinned source: src/odepack_mod.f90

Author examples/tests: test/benchmark.f90

Load checked GAMS driver: gams-lsoda-stiff-two-scale