Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I'm learning set theory independently at the moment and using a book that doesn't have a solutions manual. Under these conditions, is it okay if I make a thread asking if my solution is correct?
Yes, as long as you show your work and make sure the question hasn't been asked before!
That is, surf the "set-theory" tag a while, and maybe you'll find answers to your questions. Also, exploit the search button.