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A Contribution to the Theory of Linear Homogeneous Geometric Difference Equations (Q-Difference Equations) (Classic Reprint) - Tapa blanda

Ryde, Folke

 
9781330209400: A Contribution to the Theory of Linear Homogeneous Geometric Difference Equations (Q-Difference Equations) (Classic Reprint)

Sinopsis

Excerpt from A Contribution to the Theory of Linear Homogeneous Geometric Difference Equations (Q-Difference Equations)

In order to give a survey of the subject treated in this paper, I will here indicate the contents -of its particular sections. In 1 the main properties Of geometric factorial series are summarized. In 5 2 the proof of the existence of a system of solutions of the difference equation in question is given. In 3 these solutions are examined with regard to their asymptotic character and a proof of their linear independence is given. In 4 an examination of the analytic character Of the solutions is undertaken, and the solutions given by Grevy and Carmichael are de duced. In 5 some applications to particular equations are made. The list of literature p. 43 contains only works quoted in the paper. Of these I will especially mention the already cited works of Frobenius and nor lund, of which I have made frequent'use.

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Excerpt from A Contribution to the Theory of Linear Homogeneous Geometric Difference Equations (Q-Difference Equations)

In order to give a survey of the subject treated in this paper, I will here indicate the contents -of its particular sections. In 1 the main properties Of geometric factorial series are summarized. In 5 2 the proof of the existence of a system of solutions of the difference equation in question is given. In 3 these solutions are examined with regard to their asymptotic character and a proof of their linear independence is given. In 4 an examination of the analytic character Of the solutions is undertaken, and the solutions given by Grevy and Carmichael are de duced. In 5 some applications to particular equations are made. The list of literature p. 43 contains only works quoted in the paper. Of these I will especially mention the already cited works of Frobenius and nor lund, of which I have made frequent'use.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Reseña del editor

Excerpt from A Contribution to the Theory of Linear Homogeneous Geometric Difference Equations (Q-Difference Equations)

Introduction. A functional relation of the following type i= nA.(a:).u(a:q ) = 0, (1) 1 = 0 where Af(x), A(x),. -(0:)are known functions of the complex variable Xand where qis a real or imaginary constant while u(x) is the function to be determined, may be termed a linear homogeneous geometric difference equation (or 7-difference equation) of the n-th order. The aim of the present paper is to bring the theory of these equations, at least on some points, to the same degree of perfection as the theories of the corresponding differential equations and arithmetic (ordinary) difference equations as they have been built up the former principally by Fuchs and Frobenius (1)the latter by Norlund (1).This equation(1) is a particular case of a general class of functional relations considered by Grevy (1), following ideas set forth by Ka-nigs (1), (2), (3).The equation(1) has then been treated in detail by Carmichael(1), who employs the method of successive approximations. He also indicates a possibility of solving the equation by aid of power series, which idea has then been worked out in a particular case by Mason(1). In a still more particular case power series have been used already by Heine(1) and Thomae (1), (2)and later on by Jackson(4) and Smith(1), It is, however, possible to replace the power series by another class of series, which may be termed geometric factorial series. These series appear in many respects to be more natural to the problem in question, just as arithmetic (ordinary) Such a number placed in a parenthesis close by a name refers to the list of literature p.43.

About the Publisher

Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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