清华几个人把 Google Maps 用了 41 年的算法给超了从 1984 年算到现在，41 年没人做到过那个算法叫 Dijkstra，你没听过没关系，你每天都在用但这个卡了 40 年突破不了，因为有一道数学上的排序屏障横在中间全世界最聪明的几个脑袋都默认这玩意儿绕不过去去年算法界传奇 Robert Tarjan 还专门拿了个奖证明 Dijkstra 已经是理论最优这事看起来已经没法突破了，对不对？但清华这帮人不走这条路他们的想法很简单: 找最短路径，干嘛非要把所有点都排个序把 Bellman-Ford 那套逻辑，跟一种叫递归部分排序的方法拼起来,最后跑出来 O(m log^{2/3} n) 的复杂度官方意义上比 Dijkstra 更快,放在小图上你感觉不到差别但在网页级、全球物流级的大图里，这个差距是真实存在的明天早上你的 GPS 不会突然变快但整个最短路径问题的在很多领域发生了根本性的变化
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清华几个人把 Google Maps 用了 41 年的算法给超了从 1984 年算到现在…
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