Logical snippets

For about eighteen months now, I’ve been a regular visitor to the very useful question-and-answer site, math.stackexchange.com – this is a student-orientated forum, not to be confused with the truly wonderful mathoverflow.net which is its research-level counterpart. OK, you can think of this as (hopefully) constructive procrastination on my part …

Of course, many of the questions there, including many I’ve found myself answering, are very ephemeral or very localized or based on very specific confusions. But a small proportion of the exchanges I’ve contributed to which might, for one reason or another, be of some interest, even help, to other students — at least, to beginners and near beginners.

So I’ve put together a page of links to these logical scraps, morsels, excerpts, … snippets, shall we say. I’ve grouped the links by level and/or topic.