**DIPS 4/98**[tex source, PostScript, PDF file, dvi]-
**Title:**SYMMETRIES OF EQUATIONS CONTAINING A SMALL PARAMETER**Author:**ALEXEY V. SAMOKHINFor differential equations containing a small parameter

*e*symmetries are found in a form of series in powers of*e*. The recurrent 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 magnetohydrodynamics equations.

10 pages, LaTeX-209.

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