Posted:

**Oct 09, 2011 2:22 pm**hackenslash wrote:

The operators are as 'real' as the entities whose behaviour they're describing. In other words, if particles are 'real', then so are those quantities, because they are describing properties of those entities.

The language of mathematics is doubtless real, but whether it truly represents an abstract mathematical reality wherein functions, numbers, and sets, etc. exist (as nonlinguistic entities) is another question.