[see also: process
This paper was written in the course of the semester on......
In the course of proof, we shall encounter......
In the course of writing this paper we learned that P. Fox has simultaneously obtained results similar to ours in certain respects.
The prerequisite for this book is a good course in advanced calculus.
Then, of course, F will be one-to-one.
Of course, before going further, we must check that such a P exists.
The convergence of the sum on the left is of course a weaker statement than the convergence of (2).