Discrete and Ultradiscrete Mixed Soliton Solutions
Abstract
We propose a new type of soliton equation, which is obtained from the generalized discrete BKP equation. The obtained equation admits two types of soliton solutions. The signs of amplitude and velocity of the soliton solution are opposite to the other. We also propose the ultradiscrete analogues of them. The ultradiscrete equation also admits the similar properties. In particular it behaves the original Box-Ball system in a special case.
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