Dear All, Thanks for your suggestions regarding sage. I was able finally to install SageMath-9.0 and get it to work. The main problem was permissions in my home directory ~/.sage. A lot of these files were owned by root and had wrong permissions. Doing chown and chmod on them allowed me, finally, to open ./sage at the command line.
I can also launch the App, and start a terminal window from the App. It eventually opens a pair of browser windows, one which says: The SageNB server or Jupyter is currently starting. Please wait... -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/118fae97-a709-4228-bee7-a8d0d798e5d0%40googlegroups.com.
