My question is about how to combine set-builder notation with existential and universal quantifiers. Not spam. You can just say you are not welcome here. But don't label my question as spam. Thank you!
It is spam because you have been spamming question after question on that utterly useless 'set', while simultaneously refusing to learn what you need in order to understand what you want. The chat-room "Basic Mathematics" is for learning basic mathematics. Everything else is off-topic. And don't think I cannot remember what you did in the past.
