俺知不道。PDE不适合数学竞赛，对往下学数学帮助也不大。小姑娘需要LA、组合数学/概率论等拓宽和提高自己。我会这么推荐

来源: 成功的飞过于 2024-06-13 08:16:30 [旧帖] [给我悄悄话] 本文已被阅读：次

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