## Math symbols

I want to rewrite this math symbol which denotes convergence by putting an F directly above the arrow and flush in the middle, and n→∞ below the arrow also flush in the middle. How can i achieve this?

S→S

### I think Label above and then

I think Label above and then Label below the arrow does what you want.

### I found this discussion:

I found this discussion: http://www.stack.nl/~jwk/latex/examples/node6.html

Unfortunately, SW does not directly support \xrightarrow.  Attached is a sample document that shows the construct you want using first the Label Above and Label Below approach and then \xrightarrow as a TeX field.