## Mathematics of the USSR.: SbornikAmerican Mathematical Society, 1992 - American periodicals |

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### Contents

Kabanov and S M Pergamenshchikov Singular perturbations of stochas | 15 |

S A Shkarin Some results on solvability of ordinary linear differential equations | 29 |

E Shparlinskii On primitive elements in finite fields and on elliptic curves | 41 |

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### Common terms and phrases

according algebra analytic approximation arbitrary assertion assume asymptotic belongs boundary bounded called closed coefficients commutator compact complete condition connected Consequently consider constant constructed contains continuous convex coordinates Corollary corresponding defined definition denote depend derivatives determined differential equations domain elements English transl equal equation established estimate example exists expressed extended fact field finite fixed follows formula function given gives Hence holds homomorphism implies inequality initial integral invariant Lemma linear mapping Math Mathematical matrix means method minimal neighborhood obtain operator polynomial positive possible problem proof properties Proposition proved relation remains Remark representation represented respect result Russian satisfies sequence simple solution space stabilization subgroup sufficient Suppose surface Theorem theory transformation unique values variables vector zero