Zulip Chat Archive
Stream: new members
Topic: Any summary of all Lean tactics?
Ching-Tsun Chou (Feb 07 2025 at 19:17):
I learned of the omega
tactic only yesterday, more than three months after starting to use Lean and having read #mil and browsed through the other three introductory books given here. (None of those books mention the omega
tactic.). I wonder what else I have been missing. Is there a summary of all Lean tactics?
Aaron Liu (Feb 07 2025 at 19:23):
https://seasawher.github.io/mathlib4-help/
Ching-Tsun Chou (Feb 07 2025 at 19:27):
Alas, why isn't this on the official Lean community page?
Julian Berman (Feb 07 2025 at 19:36):
It will be shortly, a version is being worked on.
Robin Arnez (Feb 07 2025 at 20:11):
Note that you can also just #help tactic
within lean
Tomas Skrivan (Feb 07 2025 at 21:55):
Is there any description of the new mysterious tactic grind
? I keep on reading about it in the Lean 4 updates but have no clue what it is supposed to do.
Aaron Liu (Feb 07 2025 at 22:08):
I also have no idea what it's supposed to do. Apparently it will also supercede omega
?
Ruben Van de Velde (Feb 07 2025 at 22:09):
Nothing more than is said in #lean4 > `grind` is refined `cc` without AC module?, as far as I know
Kyle Miller (Feb 07 2025 at 22:18):
It's not officially released yet, but when it is there will be more information.
Robin Arnez (Feb 07 2025 at 22:29):
There is a "guide" for it in the test files https://github.com/leanprover/lean4/blob/master/tests/lean/run/grind_guide.lean
Robin Arnez (Feb 07 2025 at 22:30):
actually some of the other tests there might also help understanding what it is capable of
Vlad Tsyrklevich (Feb 08 2025 at 07:57):
Ching-Tsun Chou said:
I learned of the
omega
tactic only yesterday, more than three months after starting to use Lean and having read #mil and browsed through the other three introductory books given here. (None of those books mention theomega
tactic.). I wonder what else I have been missing. Is there a summary of all Lean tactics?
Note that omega
was only released in the last year, that is the reason many resources have not been updated to use/mention it.
spamegg (Feb 08 2025 at 08:12):
There is this for Mathlib4: https://github.com/haruhisa-enomoto/mathlib4-all-tactics
Last updated: May 02 2025 at 03:31 UTC