Contributed by
"William E. Emba"
In this shortshort classic, a mathematics professor ends the first day
of a Differential Equations class asking for questions. One student is
irksome, even peculiar, in his wish to know what practical use there
is of such "totally abstract concepts". So the professor gives him an
answer he'll never forget.
The author was, at the time, a college mathematics instructor, so we
can assume that any mathematical oddities (like calling differential
equations "totally abstract") are deliberate.
