“…Hence approaching this limit can be interesting. This situation corresponds to case I. Maxima correspond to intersections of the line (14) with the two outer segments of the graph of (13). Obviously, as time goes on, the initially well separated solitons, while propagating in the same direction, get closer to each other, i.e., the distance between the two maxima decreases, then, without coalescing, their distance grows again.…”