\usepackage{siunitx}
\sisetup{
    group-digits=true,
    group-separator={\,},
}

\def\edges{\ensuremath{\mathcal{E}_t}}
\def\nodes{\ensuremath{\mathcal{N}_t}}
\def\labeledNodes{\ensuremath{\mathcal{T}_t}}
\DeclareUnicodeCharacter{00A0}{~}