摘要
研究区间冯·纽曼－列昂惕夫模型均衡解的存在性，提出了该模型完全可解和部分可解的新概念，并给出一系列判别定理，为研究不确定性经济系统提供了新思想和方法。
The existence of equilibrium solution on interval Von-Neumann & Leontieff model is studied.The new concepts of the solvable and the partially solvable types are presented and several criteria for the solvability are given.Anideal method for undefined economic systems is presented.
关键词
经济系统
均衡解
区间模型
N-L模型
interval Von-Neumann &.Leontieff model
economic systems
nonnegative matrix
