Historical notes Rizza manifold

the history of rizza manifolds follows history of structure such objects carry. according kobayashi (1975, p. 153), geometry of complex finsler structures first studied in paper (rizza 1964): however, rizza announced results 2 years before, in short communications (rizza 1962a) , (rizza 1962b), proving them in article (rizza 1963), 1 year earlier 1 cited kobayashi. rizza called differential geometric structure, defined on even-dimensional manifolds, struttura di finsler quasi hermitiana : motivation introduction of concept seems aim of comparing 2 different structures existing on same manifold. later ichijyō (1988, p. 1) started calling structure rizza structure , , manifolds carrying rizza manifolds .