In functional analysis, it is somewhat of a sport to attach indices to all four corners of a symbol. I remember overhearing a discussion between two big player

In functional analysis, it is somewhat of a sport to attach indices to all four corners of a symbol. I remember overhearing a discussion between two big players in the field, and they obviously did not share the same starting point for reading the indices out loud. For sure, I didn't understand what they were talking about, but neither did they.