@Article{JCM-24-6,
author = {},
title = {A Simplicial Algorithm for Computing an Integer Zero Point of a Mapping with the Direction Preserving Property},
journal = {Journal of Computational Mathematics},
year = {2006},
volume = {24},
number = {6},
pages = {711--718},
abstract = {<p style="text-align: justify;">A mapping $f:Z^n\rightarrow R^n$ is said to possess the direction preserving property if $f_i(x)\gt 0$ implies $f_i(y)\geq 0$ for any integer points $x$ and $y$ with $\|x-y\|_{\infty}\leq 1$. In this paper, a simplicial algorithm is developed for computing an integer zero point of a mapping with the direction preserving property. We assume that there is an integer point $x^0$ with $c\leq x^0\leq d$ satisfying that $\max_{1\leq i\leq n}(x_i-x^0_i)f_i(x)\ge0$ for any integer point $x$ with $f(x)\neq 0$ on the boundary of $H=\{x\in R^n\;|\;c-e\leq x\leq d+e\}$, where $c$ and $d$ are two finite integer points with $c\leq d$ and $e=(1,1,\cdots,1)^{\top}\in R^n$. This assumption is implied by one of two conditions for the existence of an integer zero point of a mapping with the preserving property in van der Laan et al. (2004). Under this assumption, starting at $x^0$, the algorithm follows a finite simplicial path and terminates at an integer zero point of the mapping. This result has applications in general economic equilibrium models with indivisible commodities.</p>},
issn = {1991-7139},
doi = {https://doi.org/2006-JCM-8785},
url = {https://global-sci.com/article/85112/a-simplicial-algorithm-for-computing-an-integer-zero-point-of-a-mapping-with-the-direction-preserving-property}
}