Hashing: Fixed a typo in analysis of linear families

06-hash/hash.tex

@@ -199,7 +199,7 @@ Now, we turn back to the original linear family~$\cal L$.
 
 \proof
 We fix $x,y\in [p]$ distinct and $i,j\in [p]$. To verify $(2,4)$-independence,
-we need to prove that $\Pr[h_{a,b}(x) = i \land h_{a,b}(x) = j] \le 4/m^2$ for a~random
+we need to prove that $\Pr[h_{a,b}(x) = i \land h_{a,b}(y) = j] \le 4/m^2$ for a~random
 choice of parameters $(a,b)$.
 
 As in the proof of universality of~$\cal L$, we consider the bijection between