What's the plural form of nondivergence? Here's the word you're looking for.
Answer
The noun nondivergence can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be nondivergence.
However, in more specific contexts, the plural form can also be nondivergences e.g. in reference to various types of nondivergences
or a collection of nondivergences.