Tagged Questions

47 views

Hashing With Chaining Collision

We have $1000$ elements with key=1 to 1000, and a hashing function $$h(i)=i^3 \mbox{ mod } 10$$ for an array with length $10$ (array index from $0$ to $9$) with chaining method. What is the ...
58 views

How Jaccard similarity can be approximated with minhash similarity?

In Page 81 of this book, Mining of Massive Data Sets. It says the following: Now, consider the probability that h(S1) = h(S2). If we imagine the rows permuted randomly, and we proceed from the top, ...
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Universal hashing proof

So I tried doing this proof but I do not know how to start it properly. I know I have to show that the hash function family has the consistent and random property. The first is rather obvious to ...
139 views

Bit permutations and collisions of compression function

I'm having trouble finding a good method for solving the following problem: If $n$ is a positive integer, let $S_n$ denote the group of permutations of the set $\{1,2,\dots, n\}$. For a permutation ...