Topology and Fermionic Condensate

The purpose of this paper is to investigate an influence of a space-time topology on the formation of fermionic condensate 〈φφ〉 in the model with four-fermion interaction (φφ)². The value for the space-time with topology of R₁ × R₁ × S₁ is found. Moreover a relation of the value of fermionic condensate to a periodic length is studied. In this connection the possibility of a relation of the topologic deposits to structure of hadrons is discussed.