理解给定的哈希函数
我正在实现算法的以下步骤,我已经成功实现了前 3 个步骤,并且我在最后一步中有疑问,我无法理解用于表示哈希函数的符号,我到底需要传递什么作为参数是下面给出的哈希函数(最后一步)。 提前致谢。
I am implementing the below steps of an algorithm , i have implemented first 3 steps successfully , and i have doubt in the last step , i am unable to understand the notation used to represent the hash function , what do i exactly need to pass as argument is the below given hash functions (last step).
Thanks in advance.
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没有给出哈希函数。只有签名。您必须找到满足签名的哈希函数。
关于如何读取签名的一些提示
其域由笛卡尔积(例如A x B x C)给出的函数的工作方式如下。每个因素都是一个集合。该函数采用与笛卡尔积中涉及的因子一样多的参数。第 i 个参数必须位于笛卡尔积的第 i 个集合中。
示例
读法类似于
范围 也可以通过笛卡尔积来表示,在这种情况下,函数返回相应集合中的值向量。
There are no hash functions given. Only signatures. You'd have to find hash functions which satisfy the signatures.
Some hints on how to read the signatures
Functions whose domain is given by a Cartesian product (e.g. A x B x C) work like this. Each factor is a set. The function takes as many parameters as are factors involved in the Cartesian product. The i'th parameter has to be in the i'th set of the Cartesian product.
Example
Reads like
The range can also be expressed by means of a Cartesian product in which case the function returns vectors of values from the corresponding sets.