As a non-native English speaker, I wonder what is the correct way to use the English possessive, also known as Saxon genitive, when dealing with mathematical objects.
It seems to me that there is not an agreement about that, some examples:
but also...
Regarding theorems I think the correct way is:
"AUTHORNAME's theorem"
"FIRSTAUTHORNAME-SECONDAUTHORNAME theorem" (no 's)
Thank you in advance for any suggestion.