I submitted a 60-page paper to a reasonable math journal (Journal of Algebra) about 6 months ago. A few days ago I received an email stating that my paper was accepted. I did not get a referee report. I did not get any comments on my paper. Just an acceptance notice.
Is this usual? it seems very strange to me that the referee has absolutely no comment on a 60-page paper!
Should I ask the editor what happened?