摘要
Schweizer and Sklar (Probabilistic Metric Spaces, North-Holland, 1983) proposed an open problem (Problem 7.9.10) to extend the theory of conjugate transforms to all the semigroups (△+, τT,L) where T is continuous and Archimedean and L is associative and commutative and satisfies (7.1.9) and possibly (7.1.10) in the book mentioned above. The purpose of this letter is to solve the above problem.