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1 | [/============================================================================ |
2 | Boost.odeint | |
3 | ||
4 | Copyright 2011 Mario Mulansky | |
5 | Copyright 2011-2012 Karsten Ahnert | |
6 | ||
7 | Use, modification and distribution is subject to the Boost Software License, | |
8 | Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
9 | http://www.boost.org/LICENSE_1_0.txt) | |
10 | =============================================================================/] | |
11 | ||
12 | ||
13 | [section System] | |
14 | ||
15 | [heading Description] | |
16 | ||
17 | The System concept models the algorithmic implementation of the rhs. of the ODE ['x' = f(x,t)]. | |
18 | The only requirement for this concept is that it should be callable with a specific parameter syntax (see below). | |
19 | A System is typically implemented as a function or a functor. | |
20 | Systems fulfilling this concept are required by all Runge-Kutta steppers as well as the Bulirsch-Stoer steppers. | |
21 | However, symplectic and implicit steppers work with other system concepts, see __symplectic_system and __implicit_system. | |
22 | ||
23 | [heading Notation] | |
24 | ||
25 | [variablelist | |
26 | [[`System`] [A type that is a model of System]] | |
27 | [[`State`] [A type representing the state /x/ of the ODE]] | |
28 | [[`Deriv`] [A type representing the derivative /x'/ of the ODE]] | |
29 | [[`Time`] [A type representing the time]] | |
30 | [[`sys`] [An object of type `System`]] | |
31 | [[`x`] [Object of type `State`]] | |
32 | [[`dxdt`] [Object of type `Deriv`]] | |
33 | [[`t`] [Object of type `Time`]] | |
34 | ] | |
35 | ||
36 | [heading Valid expressions] | |
37 | ||
38 | [table | |
39 | [[Name] [Expression] [Type] [Semantics]] | |
40 | [[Calculate ['dx/dt := f(x,t)]] [`sys( x , dxdt , t )`] [`void`] [Calculates f(x,t), the result is stored into dxdt] ] | |
41 | ] | |
42 | ||
43 | [endsect] |