Stream: Miscellaneous

Topic: what is strong lemma and what is weaker lemma

view this post on Zulip walker (Feb 14 2023 at 08:53):

I find the difference really really confusing, I know that less assumptions lead to stronger results so:

(Goal A -> B) is weaker form of Goal B

but what about things like Goal B -> C and Goal (A-> B) -> C I find it very confusing when trying to rename the lemmas is the second one a stronger version or weaker version ?

view this post on Zulip Karl Palmskog (Feb 14 2023 at 08:55):

I think most people agree on that if you can derive lemma 1 from lemma 2 (but not the opposite), then lemma 2 is stronger than lemma 1. Then there are usually a bunch of "custom" meanings of logical strength floating around, but popularity seems limited for most.

Last updated: Jun 05 2023 at 10:01 UTC