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Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
A fully nonlinear Sagdeev pseudopotential approach is used to study the existence domain of fast ion-acoustic solitons
in a plasma composed of cold and warm adiabatic positive ion species and Boltzmann electrons. It is shown that, perhaps surprisingly, for appropriate values of the ion mass ratio and the electron-warm ion temperature ratio, there is a range in cold-to-warm ion density ratio over which a stopband in soliton speed exists. Solitons do not propagate in the stopband, although they can occur for both higher and lower speeds.
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Main supervisor (name and email)<br>and his / her institution
Prof Manfred Hellberg, University of KwaZulu-Natal, email address: email@example.com
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