# Is it possible to "OR" search criteria?

Is there a way to specify a search whose results list is the union of two other searches?

• Some information regarding tag searches is here May 7, 2013 at 17:27
• That's very useful, thanks!
– kjo
May 7, 2013 at 18:21

You can do OR searches on tags. For example, [linear-algebra] [or] [real-analysis] returns questions tagged with at least one of the two tags.
It doesn't look like the search engine here supports the OR operator for text keywords. You can use Google for this:
convergence OR matrix site:math.stackexchange.com