On this blog, I will try to save the relational algebra my doctor father, Professor Arnold, created, from oblivion and I will try to include my doctoral thesis too.
Because this thesis uses my diploma thesis and several lectures I heard more than 30 years ago, I don’t know how much I can resurrect.
But I will try. Below are my two papers written in German and full of spelling and other mistakes, because I tried to reconstruct them out of vastly outdated latex files.