On the problem of catastrophic relaxation in superfluid $\mathrm{^3He-B}$

In this Letter we discussed the parametric instability of texture of homogeneous (in time) spin precession, explaining how spatial inhomogeneity of the texture may change the threshold of the instability in comparison with idealized spatial homogeneous case, considered in our JETP Letter 83, 530 (2006). This discussion is inspired by critical comment of I. A. Fomin (JETP Lett., this issue) related to the above questions. In addition we considered here results of direct numerical solution of the full Leggett-Takagi equation of motion for magnetization in $\mathrm{^3He-B}$ and experimental data for magnetic field dependence of the catastrophic relaxation, that provide solid support of the theory of this phenomenon, presented in our 2006 JETP Letter.