Philosophy and psychology of mathematics according to Alfred Marshall
追溯了马歇尔数理经济学方法的哲学根源，即直觉主义数学哲学，并解释了他如何将其改造以适应经济理论的需要。
Marshall’s recipe for mathematical economics can be described as generous doses of the imagery (‘language’) of mathematics combined with as little space as possible for its demonstrative methods (‘reasonings’). In other words, use the semantics of mathematics, but be wary of its syntax. The article traces the origins of this recipe in the broadly defined ‘intuitionist’ philosophy of mathematics which marked the reformed Cambridge Mathematical Tripos during the mid-nineteenth century. Marshall’s early philosophical papers reveal that he meditated and reconstructed this philosophy in terms of his own. His later approach to mathematical economics can be accounted for as an adaptation of this intuitionist background to the needs of economic theory as he perceived them.