Papers › Solutions to the First Order Difference Equations in the Multivariate Difference Field
Solutions to the First Order Difference Equations in the Multivariate Difference Field
Lixin Du, Yarong Wei
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The bivariate difference field provides an algebraic framework for a sequence satisfying a recurrence of order two. Based on this, we focus on sequences satisfying a recurrence of higher order, and consider the multivariate difference field, in which the summation problem could be transformed into solving the first order difference equations. We then show a criterion for deciding whether the difference equation has a rational solution and present an algorithm for computing one rational solution of such a difference equation, if it exists. Moreover we get the rational solution set of such an equation.
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