Mathematical Elevator

While on my way up to the 7th (top) floor of the Math building here at the University of Arizona to turn in my paper, I started reading the little scribblings people would write on the wall such as "Love makes the world go round", followed by "With a little help from intrinsic angular momentum" and such. Then I looked up at the lighted numbers above the door that indicate which floor I was on and read the following (floor numbers in parentheses): (1) / 2 (2) e (3) pi (4) /17 (5) 2e (6) 2pi (7) infinity

And underneath all that, was written (in red pen, no less): "Incomplete proof. Resubmit."