Author: ALEXEY V. SAMOKHIN
For differential equations containing a small parameter e
symmetries are found in a form of series in powers of e .
relation on summands of the series is obtained; the first summand is just
a symmetry of the unperturbed equation (i.e., for an equation with e=0).
Conservation laws of the unperturbed equation are not conserved in case
e\neq 0 and the rate of their decay is explicitly determined.
Illustrative examples include the Burgers equation and a system of
10 pages, LaTeX-209.
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