.. index:: single: ode_solver(System)
.. _ode_solver/1:

.. rst-class:: right

**category**

``ode_solver(System)``
======================

* ``System`` - Object implementing ``ode_system_protocol``.


Common validation and option handling for non-stiff initial-value ODE solvers.

| **Availability:** 
|    ``logtalk_load(numerical_analysis(loader))``

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-09-04

| **Compilation flags:**
|    ``static``


| **Implements:**
|    ``public`` :ref:`ode_solver_protocol <ode_solver_protocol/0>`
| **Extends:**
|    ``public`` :ref:`options <options/0>`
| **Uses:**
|    :ref:`list <list/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`ode_solver_protocol/0::solve/4`  :ref:`ode_solver_protocol/0::solve/5`  :ref:`ode_solver_protocol/0::solve/6`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

.. index:: check_initial_value/3
.. _ode_solver/1::check_initial_value/3:

``check_initial_value/3``
^^^^^^^^^^^^^^^^^^^^^^^^^

Checks initial and final times and a non-empty numeric initial state.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``check_initial_value(InitialTime,InitialState,FinalTime)``
| **Mode and number of proofs:**
|    ``check_initial_value(+number,+list(number),+number)`` - ``one_or_error``

| **Exceptions:**
|    An argument is a variable:
|        ``instantiation_error``
|    A time is not a number:
|        ``type_error(number,Time)``
|    ``InitialState`` is not a non-empty numeric list:
|        ``domain_error(ode_state,InitialState)``


------------

.. index:: evaluate_derivative/3
.. _ode_solver/1::evaluate_derivative/3:

``evaluate_derivative/3``
^^^^^^^^^^^^^^^^^^^^^^^^^

Evaluates and validates a system derivative.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``evaluate_derivative(Time,State,Derivative)``
| **Mode and number of proofs:**
|    ``evaluate_derivative(+number,+list(number),-list(number))`` - ``one_or_error``

| **Exceptions:**
|    The system returns a non-numeric derivative or one with the wrong dimension:
|        ``domain_error(ode_derivative,Derivative)``


------------

Private predicates
------------------

(no local declarations; see entity ancestors if any)

Operators
---------

(none)