What I have to do to write and have published an article? Let's suppose that I have proved a theorem myself and I want to write an article about it, I have a few questions:
1) How do I have to write it ? I mean, what character should I use, what conventions I should follow, what format should I use and so on...
2) How do I know that my result is original ? I know that there are dozens of new theorems proven every day so how can I be sure that the article I send is original (maybe who will publish it has to check this) ?
3) To what magazine/site should I send it ? Maybe my result is original but it isn't very interesting so probably Annales of Mathematics isn't interested but are there any magazines/journals which publish mathematic of not too high level ?

If you are PhD then you will probably work at a university effectively engaging in open dialogue with many working professional mathematicians and will soimply know whether your theorem is correct and original.
