Competitive Equilibrium for Incomplete Market Structures
用微分方法分析不完全市场下竞争均衡的存在性和确定性，将需求函数性质推广到消费者净交易在任意维向量子空间的情形，并用价格系统概念替代价格向量。
The objective is to analyze, in a natural way, problems of existence and determinacy of competitive equilibria when the markets structures are incomplete.Then, within the limits of the differential approach, a general formalism is proposed, which allows to study easily the problems at hand.The usual properties of demand functions (behaviour near the boundary, Slutsky matrice and Walras Law) are carried over to the case the typical consumer chooses his net trade no more necessarily in an hyperplane, but more generally in a vector subspace of any dimension.These results point out the fact that the notion of a price vector has to be replaced by the notion of a price system or, alternatively by the notion of a vector of exchange ratios between bundles of commodities.