Genus of a surface
= Genus of a surface
{title2=$g$}
= Genus
{synonym}
The genus counts the handles of a connected closed orientable surface. Such a surface has <Euler characteristic> $2-2g$.
= Genus of a surface
{title2=$g$}
= Genus
{synonym}
The genus counts the handles of a connected closed orientable surface. Such a surface has <Euler characteristic> $2-2g$.