A representation of matrix-valued harmonic functions by the poisson integral of non-commutative BMO functions
摘要
In this paper, the authors study the matrix-valued harmonic functions and characterize them by the Poisson integral of functions in non-commutative BMO (bounded mean oscillation) spaces. This provides a very satisfactory non-commutative analogue of the beautiful result due to Fabes, Johnson and Neri [Indiana Univ Math J 25:159–170 (1976)].