An introduction to the theory of hyperfunctions.- Edge of the wedge theorem and hyperfunction.- Solutions Hyperfonctions Du Probleme De Cauchy.- On the global existence of real analytic solutions of linear differential equations.- Fundamental principle and extension of solutions of linear differential equations with constant coefficients.- On abstract cauchy problems in the sense of hyperfunction.- On a markovian property of stationary gaussian processes with a multi-dimensional parameter.- Ultradistributions and hyperfunctions.- Hyperfunctions and linear partial differential equations.- Relative cohomology of sheaves of solutions of differential equations.- Theory of microfunctions.- Foundation of the theory of pseudo-differential equations.- Structure of systems of pseudo-differential equations.