By Hüseyin Kocak

This is a slightly strange booklet with a twin function. First, it's a handbook to aid readers how to use PRASER, this system at the accompanying diskette for mM own desktops. moment, it's an illustrated consultant to the glorious international of experimental and theoretical dynamics, one that offers dozens of concrete examples starting from the main rudimentary, applicable for the start pupil, to the hugely complicated, appropriate for the learn mathematician. ahead of indicating what PRASER does and the way it really works, enable me describe the way it got here a.bout. prior to now decade the sector of differential and distinction equations has witnessed a striking explo­ sion of information, not just in conception but additionally in purposes to discip­ traces as assorted as biology and fluid mechanics. pcs have performed a vital position during this method through making attainable specified analyses of particular structures. during this regard, one desire simply point out the paintings of Lorenz on unusual attractors and the discoveries of Feigenbaum at the bifurcations of period maps.

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Additional info for Differential and Difference Equations through Computer Experiments: With Diskettes Containing PHASER: An Animator/Simulator for Dynamical Systems for IBM Personal Computers

Sample text

Since by default it is off, it now will be turned on (notice the highlighting of Tog on the menu). Go: The same circular orbit will be drawn with a flashing marker at the current point being plotted. NUMERICS: To bring up the NUMERICS menu. Xtend: To extend the orbit. You will be asked for a new End time. The new End time is 30 (the Set up view is updated to show this). The orbit will be computed from its last point until time 30. Notice that that you do not have to press Go. The bar will be rescaled according to the new End time.

70674 ... , but neither one is asymptotically stable. 5380 ... 7804 ... } of period 2. 4. As the parameter a is increased further, various periodic orbits of different periods appear and disappear. 0, a single orbit fills up almost the entire unit interval in a seemingly random fashion. The study of changes in a differential or difference equation as parameters are varied is called bifurcation theory. This is currently one of the most active areas of mathematical research, and we will investigate many of the important bifurcations in more detail later.

Axes-Tog: The axes will be put back in the phase portrait view, and Tog will be highlighted in green. Chapter V 46 f g n x 30 c t 15 q y Flash-Tog: To toggle a flashing marker off/on. Since by default it is off, it now will be turned on (notice the highlighting of Tog on the menu). Go: The same circular orbit will be drawn with a flashing marker at the current point being plotted. NUMERICS: To bring up the NUMERICS menu. Xtend: To extend the orbit. You will be asked for a new End time.

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