in general case. This issue is beyond the scope of the present paper and will be considered elsewhere.

[![Three-dimensional slices of the kink network - additive superposition of numerous four-dimensional lumps as it is given by Eq. . The correspondence of colors to the character of the configuration is the same as in Fig. \[Fig:layered\]. []{data-label="Fig:kink_network"}](cube1 "fig:"){width="25mm"}]{} [![Three-dimensional slices of the kink network - additive superposition of numerous four-dimensional lumps as it is given by Eq. . The correspondence of colors to the character of the configuration is the same as in Fig. \[Fig:layered\]. []{data-label="Fig:kink_network"}](cube3 "fig:"){width="25mm"}]{} [![Three-dimensional slices of the kink network - additive superposition of numerous four-dimensional lumps as it is given by Eq. . The correspondence of colors to the character of the configuration is the same as in Fig. \[Fig:layered\]. []{data-label="Fig:kink_network"}](cube4 "fig:"){width="25mm"}]{}

Charged field fluctuations in the background of a planar domain wall
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Boundary condition
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In this section we study the spectrum of color charged field fluctuations in the background of a single planar domain wall of the Bloch type.

The best thing to do would be to solve the eigenvalue problem for the kink of the finite width. However, the problem turns out to 