Summary: The present paper continues [{\it A. Mallios} and {\it I. Raptis}, Int. J. Theor. Phys. 40, 1885-1928 (2001;

Zbl 0987.83003)] and studies the curved finitary spacetime sheaves of incidence algebras presented therein from a Čech cohomological perspective. In particular, we entertain the possibility of constructing a nontrivial de Rham complex on these finite dimensional algebra sheaves along the lines of the first author’s axiomatic approach to differential geometry via the theory of vector and algebra sheaves [{\it A. Mallios}, Geometry of vector sheaves: An axiomatic approach to differential geometry, Vols. 1-2, Kluwer, Dordrecht (1998;

Zbl 0904.18001,

Zbl 0904.18002); Math. Jap. 48, 93-180 (1998;

Zbl 0910.53013)]. The upshot of this study is that important “classical” differential geometric constructions and results usually thought of as being intimately associated with $\cal C^{\infty}$-smooth manifolds carry through, virtually unaltered, to the finitary-algebraic regime with the help of some quite universal, because abstract, ideas taken mainly from sheaf-cohomology as developed in Mallios (loc. cit.).
At the end of the paper, and due to the fact that the incidence algebras involved have been interpreted as quantum causal sets [{\it I. Raptis} and {\it R. R. Zapatrin}, Int. J. Theor. Phys. 39, 1-13 (2000;

Zbl 0974.83014); Mallios-Raptis (loc. cit.)], we discuss how these ideas may be used in certain aspects of current research on discrete Lorentzian quantum gravity.