We work out the theory of fractional isomorphism graphons as a generalization to classical finite graphs. The is given in terms homomorphism densities trees and it characterized distributions on iterated degree measures, Markov operators, weak conditional expectation with respect invariant sub-σ-algebras certain quotients graphons.

In this paper, the notion of fuzzy n-polygroups (Fn -polygroups) is introduced and some related properties are investigated. In this regards, the concepts of normal  F-subpolygroups and homomorphisms of Fn-polygroups are adopted. Also, the quotient of Fn-polygroups by defining regular relations are studied. Finally, the classical isomorphism theorems of groups are generalized to Fn-polygroups p...