Count-Convolution Sketch

Join $T_1(x) \bowtie T_2(x, y) \bowtie T_3(y)$ using $H(x,y) = (h_1(x) + h_2(y))\bmod{w}$

T1 (x)
T2 (x, y)
T3 (y)
S1 (h1)
S2 (H)
S3 (h2)
1. FFT
FFT(S1)
ยท
FFT(S2)
2. Multiply
3. iFFT
4. Dot with S2
Estimate: 0