- #1
blankvin
- 15
- 1
Hi,
In my QFT course, the professor writes an infinite product like this:
∏n | k n0 > 0 ∫...
My question is, what does the `|' in the subscript "n | k" representing? When I see `|', I think logical OR - obviously that is not it. Normally, if it's a sum over two indices, commas separate the indices - not sure if `|' in place of a comma is standard notation or not.
Any ideas?Thanks,
blankvin.
In my QFT course, the professor writes an infinite product like this:
∏n | k n0 > 0 ∫...
My question is, what does the `|' in the subscript "n | k" representing? When I see `|', I think logical OR - obviously that is not it. Normally, if it's a sum over two indices, commas separate the indices - not sure if `|' in place of a comma is standard notation or not.
Any ideas?Thanks,
blankvin.