在学习Investment Science这本书的过程中,遇到一个问题,百思不得其解,想向各位高手请教。题目如下,
The following is a general result from matrix theory: Let A be an m×n matrix. Suppose that the equation Ax=p can achieve no p>=0 expect p=0. Then there is a vector y>0 with ATy=0. Use this result to show that if there is no arbitrage, there are positive state prices; that is, prove the positive state price theorem: A set of positive state prices exists if and only if there are no arbitrage oppprtunities.[Hint: if there are S states and N securities,let A be an appropriate (S+1)×N matrix.]
迫切希望各位老师,前辈能帮我解答一下!非常感谢!


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