Zulip Chat Archive
Stream: PhysLean
Topic: theorems search engine
Rein Zustand (Dec 24 2025 at 09:28):
I just found out about PhysLean very recently. Thank you for doing this for humanity! I had similar idea in the past, where I started by formalizing EPR paradox. I wanted to know if this has already been implemented in PhysLean, but there is no search engine for the theorems.
I want to contribute by either formalizing an EPR paradox or implementing a search engine for the theorems.
Rein Zustand (Dec 24 2025 at 09:49):
Oh, nvm, there is already https://www.leanexplore.com/?pkg=PhysLean . I think the link and the link name would have been clearer if it directly links to https://www.leanexplore.com/?pkg=PhysLean instead of just https://www.leanexplore.com/. And call it "Search PhysLean" instead.
Joseph Tooby-Smith (Dec 24 2025 at 10:06):
There is also: https://leandex.projectnumina.ai which I believe is a newer version of leanexplore.
I think https://www.leanexplore.com/ allows you to search Mathlib and PhysLean simultaneously, whilst https://www.leanexplore.com/?pkg=PhysLean would only restrict you to PhysLean. I think most people would want the former (but I am happy to change this on the PhysLean website if not). I agree using "Search PhysLean" on the website would be better.
We also use to have a version of Loogle for PhysLean but it got too expensive to host.
Concerning EPR paradox - we do not currently have it, and I think it would be a great addition. It would also help us build more in the Quantum Mechanics direction.
Rein Zustand (Dec 24 2025 at 10:10):
I tried and I was able to add both Mathlib and PhysLean as contexts: https://www.leanexplore.com/?pkg=PhysLean&pkg=Mathlib.
Rein Zustand (Dec 24 2025 at 10:15):
https://leandex.projectnumina.ai/?pkg=Mathlib&pkg=PhysLean&use_llm=true is indeed better than leanexplore.com.
Joseph Tooby-Smith (Dec 24 2025 at 11:46):
Good to know - when I get chance I will update the website
Joseph Tooby-Smith (Jan 05 2026 at 13:33):
(I've updated the website, including the things discussed here)
Last updated: Feb 28 2026 at 14:05 UTC