关于数学竞赛的建议
关于数学竞赛的建议
体育通过提供卓越的生动范例来服务社会。
— 乔治·威尔
我非常享受高中时期参加数学竞赛的经历(那要追溯到1980年代了!)。就像其他学校体育赛事一样,与志趣相投、才华相当的同伴一起参与竞争性活动,会带来某种程度的兴奋感。在奥林匹克级别,还有机会在国内和国际间旅行,这是我强烈推荐所有高中生体验的经历。
数学竞赛也证明了数学不仅仅是关于成绩和考试。但数学竞赛与数学学习或数学研究是非常不同的活动;不要期望你在研究生学习中遇到的问题会像奥林匹克问题那样具有同样干脆利落、简洁明了的风格。(虽然解题的个别步骤可能由受过奥林匹克训练的人快速完成,但大部分解题过程可能需要更耐心、更漫长的过程,包括阅读文献、应用已知技术、尝试模型问题或特殊情况、寻找反例等等。)
此外,你在做奥林匹克问题时学到的”经典”数学(如欧几里得几何、初等数论等)可能与你本科和研究生阶段学习的”现代”数学看起来截然不同,但如果你深入挖掘,你会发现经典数学仍然隐藏在现代数学的基础之中。例如,欧几里得几何中的经典定理为现代代数几何或微分几何提供了极好的范例,而经典数论同样为现代代数和数论提供了基础,等等。因此,在学习该学科的现代方面时,要做好数学视角发生重大变化的准备。(也许组合数学领域是个例外,它仍有很大部分与其经典根源非常相似,不过这种情况也在改变。)
总之:享受这些竞赛,但不要忽视数学教育中更”枯燥”的方面,因为这些方面最终被证明更有用。
一些关于数学竞赛的名言集锦可以在这里找到。
Advice on mathematics competitions
Sports serve society by providing vivid examples of excellence.
— George Will
I greatly enjoyed my experiences with high school mathematics competitions (all the way back in the 1980s!). Like any other school sporting event, there is a certain level of excitement in participating with peers with similar interests and talents in a competitive activity. At the Olympiad levels, there is also the opportunity to travel nationally and internationally, which is an experience I strongly recommend for all high-school students.
Mathematics competitions also demonstrate that mathematics is not just about grades and exams. But mathematical competitions are very different activities from mathematical learning or mathematical research; don’t expect the problems you get in, say, graduate study, to have the same cut-and-dried, neat flavour that an Olympiad problem does. (While individual steps in the solution might be able to be finished off quickly by someone with Olympiad training, the majority of the solution is likely to require instead the much more patient and lengthy process of reading the literature, applying known techniques, trying model problems or special cases, looking for counterexamples, and so forth.)
Also, the “classical” type of mathematics you learn while doing Olympiad problems (e.g. Euclidean geometry, elementary number theory, etc.) can seem dramatically different from the “modern” mathematics you learn in undergraduate and graduate school, though if you dig a little deeper you will see that the classical is still hidden within the foundation of the modern. For instance, classical theorems in Euclidean geometry provide excellent examples to inform modern algebraic or differential geometry, while classical number theory similarly informs modern algebra and number theory, and so forth. So be prepared for a significant change in mathematical perspective when one studies the modern aspects of the subject. (One exception to this is perhaps the field of combinatorics, which still has large areas which closely resemble its classical roots, though this is changing also.)
In summary: enjoy these competitions, but don’t neglect the more “boring” aspects of your mathematical education, as those turn out to be ultimately more useful.
For advice on how to solve mathematical problems, you can try my book on the subject.
Some collected quotes on mathematics competitions can be found here.