无穷一直是诗人、艺术家、哲学家、神学家、科学家关注的焦点，它有着极为丰富的内涵，在不同的思想领域中有着不同的表现形式。自然数引出的无限多、无穷大等概念，打开了人类认识无限性的大门。对自然数序列“不可穷尽”的不同理解，产生了“实无限”与“潜无限”的数学哲学争论。%The infinity ,which is always the focus of poets ,artists ,philosophers ,theologians and scientists ,has a rich content and different expression forms in different mind area .Natural numbers raise some concepts ,such as infinity and so on ,and opened the gate of infinity of man cognition .There is the argument of mathematical philosophy between actual infinity and potential infinity ,since we have different understanding on limitlessness of natural number sequence .
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