It was on the morning of April 15 that the act occurred.
The woman was on her way to spend time with her children in custody and was then assaulted by her ex-husband at the station in the tunnels under the train tracks.
The man was arrested on the spot and large parts of the course of events were captured on film.
The murder received a great deal of attention when it occurred within the same three-week period as four other murders of women in the spring of 2021.
Denies murder
The man sentenced to life has always denied murder and instead claimed that he heard inner voices that should have affected him.
However, a forensic psychiatric examination has not been able to show that the man suffered from any serious mental disorder at the time of the incident.
The Court of Appeal hearing will take place on 6 and 10 December at the Göta Court of Appeal.