the pressure drop.

To deal with the dynamics equations (\[Dyn-Eq-Henry\]) and (\[Dyn-Eq\]) one needs to provide it with a reasonable initial condition, i. e. to choose the value of constant $R_i$, initial radius of the bubble, in the following equality $$\label{R(0)}
R(t)|_{t=0} = R_i\; .$$ In papers \[\[Epstein-Plesset\], \[Cable-Frade\]\] there was no special meaning assigned to the value of $R_i$: the reason of appearance of the bubble was totally excluded from discussion. Here we assume that the bubble nucleated fluctuationally, i. e. crossed the barrier corresponding to radius $R_c$. It means that $R_i$ has to be not less than $R_c$, but evidently we cannot use the radius of a critical bubble $R_c$ as the initial value for the radius.

A bubble that nucleates fluctuationally in the solution is capable of regular growth if it passed and, moreover, moved away from the near-critical region where fluctuations are still strong enough. Thus we choose, following \[\[Kuchma-Gor-Kuni\]\], $R_i = 2 R_c$, i. e. $$\label{2Rc}
R(t)|_{t=0} = 2 R_c\; .$$ Such value guarantees the absence of fluctuations and, as we will see further, provides us with convenient expressions.

The necessary condition for the fluctuational nucleation of a bubble is a high pressure drop ($P_0/\Pi 