请问卷积都有什么常见的意义啊？

学术版

zhiyangfan @ 2021-07-19 19:34:42

rt。对于\sum_{i+j=k}a_ib_jx^k这样的卷积，把\sum和+换成其他运算符应该会有其他意义，但我一时想不很到，求助qwq。

by zhy137036 @ 2021-07-19 19:36:39

换成乘号是狄利克雷卷积

by SymphonyOfEuler @ 2021-07-19 19:38:56

@zhiyangfan 头像好评

by zhiyangfan @ 2021-07-19 19:39:24

@zhy137036 Orz谢谢

by zhiyangfan @ 2021-07-19 19:40:07

@Reaper 好家伙两只（？温迪

by zhiyangfan @ 2021-07-19 19:40:46

我记得有个意义是背包的卷积，把 \sum 换成了 \max ，但具体想不起来了/kk，求救

by lgnotus @ 2021-07-19 19:41:30

再来一只温迪！

by lgnotus @ 2021-07-19 19:41:53

az,建议 CTRL+F5 再看

by zhiyangfan @ 2021-07-19 19:43:02

好家伙，这个帖子全是温迪（所以背包的卷积谁记得/kel）

by 伊莉雅丝菲尔 @ 2021-07-19 19:44:15

草,头像好感10

by zhiyangfan @ 2021-07-19 19:47:46

啊想起来了，应该是\max_{i+j=k}a_ib_jx^k，此贴完结

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