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关于函数定义的一点看法陕西省咸阳市渭城中学冯亚兰集合论是现代数学的基础．现代所谓的数学的严格性就是指：所有的数学概念都可以建立在集合与逻辑的概念之上．这种严格性长期以来都被人们认为是一种纯理论的东西．可是，自从计算机问世以后，这种严格性却恰恰成了人机...
A little view on the definition of functions The Feng Yalan set theory of Fucheng Middle School in Xianyang City, Shaanxi Province is the foundation of modern mathematics. The so-called strictness of modern mathematics means that all mathematical concepts can be built on the concepts of set and logic. This strictness has long been regarded as a purely theoretical thing. However, since the advent of computers, this rigor has just become a human machine...