EN
For 1 ≤ p,q ≤ ∞, we prove that the convolution operator generated by the Cantor-Lebesgue measure on the circle 𝕋 is a contraction whenever it is bounded from $L^{p}(𝕋)$ to $L^{q}(𝕋)$. We also give a condition on p which is necessary if this operator maps $L^{p}(𝕋)$ into L²(𝕋).