So the title of the question is quite broad, I've seen a few of questions in the site regarding this particular topic (quite a few actually, so let me know if this is somehow a duplicate).
My problem is the following, I am working on my PhD thesis, and so far me and my supervisor have collaborated in a few articles (that somehow constitute the body of my thesis). Right now I am working on a particular article (on which I've made all the work). The fact is that my supervisor, and apparently all the members of my faculty tend to put authors in alphabetic order. The fact is that my last-name starts with a "T" so by using their logic I will almost surely end-up being the second\third author.
I don't feel this is actually fair, since after some search online I've seen that in general the order of the authors reflects somehow how much work was done by each one. So it seems strange for me to be like "coauthoring" my own PhD thesis.
What should I do? I don't want to appear pretentious, or rude in front of my supervisor, but I don't think it's fair for me either.
Do you have some advice on what to do?
In case it's relevant my field of research is pure math.