I am PhD student in mathematics, from Aisa region. I started a project in 2020 and a (assistant) professor from Europe formally promised to work together. This is my old question here, here, and here. I am going to be details here (sorry), so that, readers can understand the situation:
My coauthor(?) didn't cooperate with the results of the paper. Every time, after partial progress from my side, I used to send those results to him through emails, seeking his help to shift my results for further improvements. But he was irregular in communication; after a couple of emails in 2-3 months, he used to reply once with the promise that he would look into it. But ultimately, nothing happened. This procedure continued until 2022. I was very upset due to this. Finally, I completed the whole paper (with the help of other professors) at the beginning of 2022 and again sent the final paper to him to look into and revise the paper in a nice way because my language writing is not that creative. I suffered in publishing my previous article due to poor writing. My whole intention from my coauthor was that he will read the paper, check the calculations and revise it in a creative way before submitting it to journals. So far he did nothing but this time he read the paper and point out a minor error in two results, but then I have then corrected those errors on my own. So I am grateful to him for pointing out two errors in my papers. After correcting two errors, I sent the final revised version to her in March 2022 and asked him to revise the language and submit it in a journal, but since then he has continued to promise to revise and submit the paper. Indeed, I was happy to offer him authorship, though I am not sure if he really deserves to be an author(?). But 2022 passed, 2023 is almost finished, and still he is not taking action. After failing to communicate at several attempts, I said that if he doesn't finish the paper by September 2023, I will have to submit it in arxiv because I wanted to mention the paper in the few post-doctoral positions as my proposed research plan will be based on this particular paper, and that is why I repeatedly requested that he submit the paper in arxiv at least so that I can show the paper in my resume. But he still didn't reply within September, and hence I submitted the paper in arxiv (without his name since I got no consent from him) and acknowledged him. I sent him an email and mentioned that I have submitted the paper in Arxiv but will not submit it to a journal. As soon as he revises it, I will update the paper in Arxiv and add his name. This time he replied and said to add his name to the paper "as soon as possible," with some strong words. and he said he has been unwell since September 2023, so he couldn't reply. In my response, I stated that I had submitted the version to arxiv, for which I was solely responsible for all of the results. He knows it that he didn't do anything and that is why in his next reply he became soft. I then requested that he revise the paper and submit it to the journal. Since it is a health issue, I am emotionally more in favour of him and truly want him as a coauthor. Besides that, he is an established mathematician, so it would be slightly beneficial if he remained as a coauthor. But I can't understand if he has really been in the hospital since September 2023, though he is replying to emails regularly (since I submitted the paper in arxiv). This is something that I am stuck at. Suddenly, I saw in his profile that he mentioned the paper title in his CV and mentioned it as a preprint (preparation/submission). Of course, he mentioned me as an author as well. This is why I don't want to upshet him by proceeding alone. So here is my question:
How long should I wait for him, or should I proceed as a solo author?
Does he really deserve a coauthor (for pointing out errors)?
Is he just holding onto the project but not interested in it?
I appreciate your valuable suggestions that I really need. I am suffering the situation for long time. Even if I exclude tese 3 months of his unwell, in the last one and half years, he did nothing significant as coauthor. I am a PhD student and suffering this bad situation.