Progress of Theoretical Physics Vol. 41 No. 1 (1969) pp. 271-273 Functional Manifold as a Basis of Physical Formulation Shûkô Azuma Progress of Theoretical Physics Vol. 46 No. 1 (1971) pp. 308-331 Generalization of Quantum Field Theory on the Basis of Function Manifold Shûkô Azuma