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The Propagation Window

Figure 2.21: A Propagation window for vector fields.
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Figure 2.22: A Propagation window for mappings.
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Window title:
DsTool: Propagation
Function:
The Propagation window allows the user to select and control the algorithms used to compute trajectories.
Description:
The Propagation window is opened by selecting the Propagation window button located in the Orbits window. The Propagation window contains parameters necessary to control the forward and backward propagation of trajectories. The window's appearance depends upon the model chosen as well as the method of propagation.
Panel items:

We first describe the Propagation window as it appears for vector fields:

The panel items in the Propagation window will change with the method of propagation selected. The top portion of the panel consists of $k \geq 1$ stack settings from which the user may select algorithms used by the propagator. The lower left section of the panel consists of $i \geq 0$ numeric fields which are used to control integer parameters of the algorithms chosen. These fields may be used, for example, to set the maximum number of Newton iterations used in estimating an inverse image for a diffeomorphism is one example of an integer parameter. The lower right section of the panel contains a list of $j \geq 0$ double precision fields which are used to control floating point parameters of the chosen numerical algorithms. These fields may be used, for example, to set the minimum step size allowable for variable-step integrators, or to establish convergence criteria for Newton's method.

We now describe the Propagation window as it appears for mappings:

The panel entries of the Propagation window will depend upon the current dynamical system. In particular, an option will not be displayed if the current model does not allow the method in question to be used.


next up previous contents
Next: The Multiple Orbits Window Up: Attributes of Interface Windows Previous: The Orbits Window   Contents
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1998-11-02