"The indices permute into an expanded expression; otherwise, it couldn’t possibly represent a line integral, as the author says it is. It’s lovely. And see here-this simple-looking expression. The simplicity is deceptive. It obviously represents not one, but a whole system of equations, in a very contracted form. It took me a couple of days to realize that the author was thinking of the relationships-not just of quantities to quantities-but of whole systems to other systems. I don’t yet know all the physical quantities involved, but the sophistication of the mathematics is just-just quietly superb! If it’s a hoax, it’s inspired! If it’s authentic, we may be in unbelievable luck. In either case, it’s magnificent. I must see the earliest possible copy of it."