I encountered the notion of 4-universal hash function and I cannot understand what exactly it means. This article https://en.wikipedia.org/wiki/Universal_hashing did not really help to clarify it.
Thanks!
2026-03-25 23:40:27.1774482027
What does "4-universal hash function" mean?
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Unfortunately, the jargon around this is not consistent. 4-universal hashing is 4-independent hashing.
Note that there is no such thing as a 4-universal hash function - k-independence and k-universality are a function of families of hash functions.