ITDS Differential Equations Documentation

A SciPy-backed differential equations library with APIs inspired by the IMSL Fortran Numerical Library.

ODE/BVP/DAE solvers backed by SciPy

ITDS Differential Equations packages the IVP, BVP, and DAE solvers from ITDS into a focused SciPy-backed library. Install, run a minimal Van der Pol example, then dive into the API reference.

Open quick start Browse API reference

SciPy-backedAll routines delegate to battle-tested SciPy integrators.

15 FunctionsIVP, BVP, DAE, events, dense output, and analysis routines.

IMSL-styleFunction families aligned with legacy Fortran engineering workflows.

200+ TestsComprehensive unit and integration tests shipped with the package.

IVP Solvers

ivpag, ivprk, ivpbs, ivpam, ivpgb, ode45, ode_stiff — multiple methods for stiff and non-stiff systems.

BVP Solvers

bvpfd (finite differences) and bvpms (shooting method) for two-point boundary value problems.

DAE & Events

daspg for differential-algebraic systems, ivp_with_events for zero-crossing detection, phase_portrait for multiple trajectories.

Recommended path: install the package, run the quick start, then use the examples page to find the closest solver family before dropping into the API reference.

Contents

• Installation
  • Requirements
  • Install from the package directory
  • Verify the installation
  • Build the HTML documentation
• Quick Start
• Examples
  • Example Script Map
• API Reference
  • Public API
• License
  • Differential Equations Commercial License Agreement
  • 1. Definitions
  • 2. License Type and Commercial Models
  • 3. License Grant
  • 3A. Included Deliverables and Pipeline Setup Services
  • 4. Redistribution Boundary
  • 5. Restrictions
  • 6. Intellectual Property
  • 7. Fees, Royalty, and Audit
  • 8. Confidentiality
  • 9. Warranty Disclaimer
  • 10. Limitation of Liability
  • 11. Term and Termination
  • 12. Export and Compliance
  • 13. Governing Law
  • 14. Entire Agreement
  • 15. Contact