Theorem 2.1 ([1]}) 
Let \(X\)  and \(Y\)  be metric spaces. Then
\(d_{GH}(X,Y) = \frac{1}{2}\inf \bigl \lbrace \operatorname{dis}R: R \in \mathcal {R}(X,Y)\bigr \rbrace .\) 


Теорема 2.1 ([1])

Пусть \(X\) и \(Y\) - метрические пространства. Тогда

\(d_{GH}(X,Y) = \frac{1}{2}\inf \bigl \lbrace \operatorname{dis}R: R \in \mathcal {R}(X,Y)\bigr \rbrace .\)