Source: wikibot/commensurability-group-theory
= Commensurability (group theory)
{wiki=Commensurability_(group_theory)}
In group theory, the concept of commensurability relates to the way in which two groups can be compared based on their subgroups and certain structural properties. Two groups \\( G \\) and \\( H \\) are said to be **commensurable** if they share a common finite-index subgroup.