Unless I am grossly misunderstanding your notation, I have always seen RA written with the operator first. Some examples: https://cs186berkeley.net/notes/note6

Unless I am grossly misunderstanding your notation, I have always seen RA written with the operator first. Some examples: https://cs186berkeley.net/notes/note6/ https://cs186berkeley.net/notes/note6/ https://web.wlu.ca/science/physcomp/ikotsireas/CP465/W1-Intro-Review/RelationalAlgebra.pdf https://web.wlu.ca/science/physcomp/ikotsireas/CP465/W1-Intr... https://home.adelphi.edu/~siegfried/cs443/443l9.pdf https://home.adelphi.edu/~siegfried/cs443/443l9.pdf