Shorthand notation for "increases" and "decreases" I want to write out something like:
"As $x$ increases, $y$ decreases."
Is there a standard symbolic notation for this, such as an up arrow and a down arrow?  (And if you can tell me how to write it in latex, that would be awesome, too).
Thanks!

I would do $f(t_1) > f(t_0)  \forall t_1 > t_0$ or something similar. It is not that hard to write out and is quite clear.
