{"title":"三维常系数差分方程组的解","authors":"Merve Kara, Ömer Aktaş","doi":"10.31801/cfsuasmas.1163955","DOIUrl":null,"url":null,"abstract":"In this study, we show that the system of difference equations \n\\begin{align}\nx_{n}=\\frac{x_{n-2}y_{n-3}}{y_{n-1}\\left(a+bx_{n-2}y_{n-3} \\right) }, \\nonumber \\\\ \ny_{n}=\\frac{y_{n-2}z_{n-3}}{z_{n-1}\\left(c+dy_{n-2}z_{n-3} \\right) },~n\\in\\mathbb{N}_{0}, ~ \\nonumber \\\\ \nz_{n}=\\frac{z_{n-2}x_{n-3}}{x_{n-1}\\left(e+fz_{n-2}x_{n-3} \\right) }, \\nonumber \\\\\n\\end{align}\nwhere the initial values $x_{-i}, y_{-i}, z_{-i}$, $i=\\overline{1,3}$ and the parameters $a$, $b$, $c$, $d$, $e$, $f$ are non-zero real numbers, can be solved in closed form. Moreover, we obtain the solutions of above system in explicit form according to the parameters $a$, $c$ and $e$ are equal $1$ or not equal $1$. In addition, we get periodic solutions of aforementioned system. Finally, we define the forbidden set of the initial conditions by using the acquired formulas.","PeriodicalId":44692,"journal":{"name":"Communications Faculty of Sciences University of Ankara-Series A1 Mathematics and Statistics","volume":" ","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On solutions of three-dimensional system of difference equations with constant coefficients\",\"authors\":\"Merve Kara, Ömer Aktaş\",\"doi\":\"10.31801/cfsuasmas.1163955\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this study, we show that the system of difference equations \\n\\\\begin{align}\\nx_{n}=\\\\frac{x_{n-2}y_{n-3}}{y_{n-1}\\\\left(a+bx_{n-2}y_{n-3} \\\\right) }, \\\\nonumber \\\\\\\\ \\ny_{n}=\\\\frac{y_{n-2}z_{n-3}}{z_{n-1}\\\\left(c+dy_{n-2}z_{n-3} \\\\right) },~n\\\\in\\\\mathbb{N}_{0}, ~ \\\\nonumber \\\\\\\\ \\nz_{n}=\\\\frac{z_{n-2}x_{n-3}}{x_{n-1}\\\\left(e+fz_{n-2}x_{n-3} \\\\right) }, \\\\nonumber \\\\\\\\\\n\\\\end{align}\\nwhere the initial values $x_{-i}, y_{-i}, z_{-i}$, $i=\\\\overline{1,3}$ and the parameters $a$, $b$, $c$, $d$, $e$, $f$ are non-zero real numbers, can be solved in closed form. Moreover, we obtain the solutions of above system in explicit form according to the parameters $a$, $c$ and $e$ are equal $1$ or not equal $1$. In addition, we get periodic solutions of aforementioned system. Finally, we define the forbidden set of the initial conditions by using the acquired formulas.\",\"PeriodicalId\":44692,\"journal\":{\"name\":\"Communications Faculty of Sciences University of Ankara-Series A1 Mathematics and Statistics\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2023-06-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications Faculty of Sciences University of Ankara-Series A1 Mathematics and Statistics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.31801/cfsuasmas.1163955\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications Faculty of Sciences University of Ankara-Series A1 Mathematics and Statistics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31801/cfsuasmas.1163955","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
On solutions of three-dimensional system of difference equations with constant coefficients
In this study, we show that the system of difference equations
\begin{align}
x_{n}=\frac{x_{n-2}y_{n-3}}{y_{n-1}\left(a+bx_{n-2}y_{n-3} \right) }, \nonumber \\
y_{n}=\frac{y_{n-2}z_{n-3}}{z_{n-1}\left(c+dy_{n-2}z_{n-3} \right) },~n\in\mathbb{N}_{0}, ~ \nonumber \\
z_{n}=\frac{z_{n-2}x_{n-3}}{x_{n-1}\left(e+fz_{n-2}x_{n-3} \right) }, \nonumber \\
\end{align}
where the initial values $x_{-i}, y_{-i}, z_{-i}$, $i=\overline{1,3}$ and the parameters $a$, $b$, $c$, $d$, $e$, $f$ are non-zero real numbers, can be solved in closed form. Moreover, we obtain the solutions of above system in explicit form according to the parameters $a$, $c$ and $e$ are equal $1$ or not equal $1$. In addition, we get periodic solutions of aforementioned system. Finally, we define the forbidden set of the initial conditions by using the acquired formulas.