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I'm not really sure the thread fits this forum but I'm not a mathemacian, too.

I posted below a picture of a soliton (solitary wave) and I have some questions about it.

We are seeing two snapshots taken at time t1 and t2.

If t2=t1+a with a, small enough?

Can we say that fb-fa equals a kind like of derivative of f (i.e. f')?

can we say that this difference is the motive/reason of the soliton since fa + (fb-fa) = fb?

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# Solitary wave motive/reason?

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