We call L = ( X , S , { f s : s ∈ S } ) {\displaystyle {\mathfrak {L}}=(X,S,\{f_{s}:s\in S\})} a self-similar structure.
ما داریم: L = ( X , S , { f s } s ∈ S ) {\displaystyle {\mathfrak {L}}=(X,S,\{f_{s}\}_{s\in S})} یک ساختار خود همانند .