Some general questions, please:
(1) I am studying graduate math online, this forum is the best place for getting help. If I post a question and if I would like a certain person whom I respected to help with my problem, how do I "invite" him?
(2) If I post a problem for guidance, for those of you who are professors or emeritus professors, would you frown on it and consider it as dishonesty?
(3) I saw a posting here with what looks like an scanned image of a diagram, how do you do that? Where to find help? (Just the other day I did just that, but the jpg image showed up so small in the posting that I was penalized and got two down-votes as a result.)
Thank you for your time and help.