5. Conclusions

[20]  It is found that the envelopes of the amplitudes of giant pulsations have visual similarity to solitons. The Pg parameters generally satisfy the quantitative relation between the amplitude, duration, and filling in frequency of wave packets characteristic for solitons. On the basis of the approximately linear dependency of the maximum amplitude of Pg pulsations on 1/t f^1/2 we believe that Pg pulsations are envelope solitons. We suggest that some Pg pulsations are nonlinear structures having properties of solitons.