I have been looking at the Navier Stokes equations and the formal presentation of them in the Millennium prize problems. There are two pieces of notation I cannot understand, I was hoping someone here could explain what they mean.
I know Rn means n dimensional space and [0, infinity) is the range of values greater than or equal to zero and less than infinity but I do not know what the cross between them signifies.
The context this is in is "a<b on "
The context this is in is
and where p and u are physical quantities.
I really don't know what this could mean but I'm sure it is not just a value raise to the power of infinity.
The document where this is all contain is here
P.s. I don't expect to solve these equations, I just have fun trying