Hello 
We are using the MathJax plugin but there are still users that do not know how to write with it. So there are a lot of posts that contain bad formulas like a+5=9. We are trying to create a special group of users that are allowed to edit and fix those posts (this is the only privilege this group gets).
How can I create a new group of users that can edit and fix other user’s posts per one category?
Thank you
AI-generated summary
The discussion revolves around creating a group of users with the ability to edit and fix posts in a specific category, particularly for correcting poorly formatted math expressions in the MathJax plugin. verilog15 seeks a way to allow a defined group to edit posts without granting full moderation rights. pfaffman suggests enabling Make new topics wikis by default, but notes it allows editing by anyone with trust level 3. Remah clarifies that the setting applies to users at trust level 3 and references a guide on assigning moderator powers to groups in a category. pfaffman corrects the assumption about trust level 3, citing the code, and JammyDodger adds that there’s ongoing discussion about a future feature allowing group-specific edit permissions.
If it’s the original post, you can enable Make new topics wikis by default for the category, but that works only for the original post and anyone will be able to edit it.
Isn’t it anyone who has the minimum trust level to edit wiki posts?
From memory that setting defaults to trust level 3 (TL3).
P.S. @verilog15, you can allow a group of users to have some moderator powers in a specific category:
Yes! Good point.
The code begs to differ! 
Small update to this one - there’s some discussion of the potential for a group-enabled setting which may cover this use-case: