"diffy Q" vs. "D.E." for "Differential Equations"

Fred Shapiro fred.shapiro at YALE.EDU
Mon Sep 4 20:39:02 UTC 2000

On Mon, 4 Sep 2000, Gerald Cohen wrote:

>         A retired professor of Mathematics at my campus tells me he is
> familiar with the colloquial  "Diffy Q" (for "Differential Equations") only
> from our campus (University of Missouri-Rolla).  Elsewhere he has heard the
> reference only as "D.E."
> He has been retired for ten years.
>         I told him I would ask ADS-L about this.  Can anyone help?  Is
> anyone familiar with "Diffy Q" at other universities?

I think this is probably widespread.  I remember it being used at MIT in
the 1970s.

Fred Shapiro

Fred R. Shapiro                             Editor
Associate Librarian for Public Services     YALE DICTIONARY OF QUOTATIONS
  and Lecturer in Legal Research            Yale University Press,
Yale Law School                             forthcoming
e-mail: fred.shapiro at yale.edu

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