XI: 15, 298-302, LNM 581 (1977) ZANZOTTO, Pio Andrea Sur l'existence d'un noyau induisant un opérateur sous markovien donné (Measure theory) The problem is whether a positive, norm-decreasing operator $L^\infty(\mu)\rightarrow L^\infty(\lambda)$ (of classes, not functions) is induced by a submarkov kernel. No ``countable additivity'' condition is assumed, but completeness of $\lambda$ and tightness of $\mu$ Comment: See 923, 924, 1030 Keywords: Pseudo-kernels, Regularization Nature: Original Retrieve article from Numdam