Sorry there was a typo in (**) Corrected: (**) if A≈B & C≈D & A∩C≈B∩D then A∪C≈B∪D
J josediez New member Joined Apr 6, 2024 Messages 2 Apr 7, 2024 #1 Sorry there was a typo in (**) Corrected: (**) if A≈B & C≈D & A∩C≈B∩D then A∪C≈B∪D
