在数学界，鲁宾逊是无穷小的代名词。菲氏微积分徒子徒孙不喜欢无穷小，当然不会纪念鲁宾逊的诞辰，所以我们要特别隆重地纪念数学家鲁宾逊的100周年诞辰。

    当前，无穷小在中国高校数学教育界掀起一阵“风浪”，菲氏徒子徒孙心中发慌，害怕丢掉饭碗。

美国年轻数学家Joel A. Tropp（1977- ）发表论文“无穷小：历史与应用”，写作中参考许多关于无穷小的珍贵文献，本文附后，供读者参考。

隆重纪念鲁宾逊诞辰，不走样，不离谱，就是要突出无穷小的学术地位。无穷小是严格的数学概念，不是玄学。

    我们预祝大家国庆节愉快！

袁萌  陈启清  9月30日

附：无穷小研究的参考文献

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[7] Goldblatt, Robert. Lectures on the Hyperreals: An Introduction to Nonstandard Analysis. Graduate Texts in Mathematics #188. Springer-Verlag, New York, 1998.

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[9] Loeb, Peter A. “Nonstandard Analysis and Topology.” Nonstandard Analysis: Theory and Applications. Eds. Lief O. Arkeryd et al. NATO ASI Series C 493. Kluwer Academic Publishers, Dordrecht, 1996.

[10] Nonstandard Analysis: Theory and Applications. Eds. Lief O. Arkeryd et al. NATO ASI Series C 493. Kluwer Academic Publishers, Dordrecht, 1996.

[11] Robert, Alain. Nonstandard Analysis. John Wiley & Sons, Chichester, 1988.

[12] Rudin, Walter. Principles of Mathematical Analysis. 3rd ed. International Series in Pure and Applied Mathematics. McGraw-Hill, New York, 1976.

[13] Russell, Bertrand. Principles of Mathematics. 2nd ed. W.W. Norton & Company, New York, 1938.

[14] Russell, Bertrand. “Denition of Number.” The World of Mathematics. Vol. 1. Simon and Schuster, New York, 1956.

[15] Schechter, Eric. Handbook of Analysis and Its Foundations. Academic Press, San Diego, 1997.

[16] Varberg, Dale and Edwin J. Purcell. Calculus with Analytic Geometry. Prentice Hall, Englewood Clis, 1992.