On Sun, 13 Jan 2013 22:36:44 +0000, Timothy Murphy wrote:
> Timothy Murphy wrote: > >> How do you read stackexchange.math.com (if you do)? >> I estimate that there are about 30 postings per hour. > > 1) I should have said math.stackexchange.com > > 2) I see that one can in fact filter the postings > by specifying eg "number-theory" in the search box.
Instead of typing "number-theory" (or whatever) in the search box at top of page, click TAGS (in the Questions/ Tags/Users/Badges/Unanswered line) and type some letters of a topic into the "Type to find tags:" box. As you type more letters, the number of tags offered below the box narrows down; when whichever topic is of interest appears, click it, and a list of questions for that topic will appear.
Also, when you are looking at a question, if you click one of the tags below the question, or one of them at top right of question, a list of questions for that topic will appear. Same thing for tags in the Related Tags section of the right-hand sidebar. If you specify multiple tags in a search box you get a list of questions that carry all of the tags. Eg, <http://math.stackexchange.com/questions/tagged/prime-numbers+number-theory>
One can also subscribe to tags and receive emails or an email digest for questions so tagged, but I didn't find it useful when I did that, because of volume of traffic and delay due to digest. YMMV.