文摘
Let G be a locally compact group. Let σ be a continuous involution of G and let μ be a complex bounded and σ-invariant measure. We determine the continuous, bounded and μ-central solutions of the functional equation $$ \int\limits_{G} f(xty)d \mu (t) + \int\limits_{G} f(\sigma (y) tx) d \mu(t) = 2f(x)g(y),\, \quad x,y \in G. $$