[texhax] derivatives and integrals: math operators

[W.J. Metzger]

An upright d is listed as the notation for the total differential by
the International Union of Pure and Applied Physics (IUPAP) -- see

   http://www-v2.sp.se/metrology/IUPAP_SUNAMCO/IUPAP SUNAMCO
Commission_files/IUPAP_Red_book_1987/SUNAMCO Red book
1987/index_red_book_iupap_sunamco_1987.htm

or google on   iupap units

This always seemed reasonable to me since it makes an equation like
     dd = vdt
more readable.
Cheers,

Dr. W. J. Metzger            Experimental High Energy Physics Group
tel. +31-24-3653127          Faculty of Science
      +31-24-3652099 (secr.)  Radboud University Nijmegen
fax. +31-24-3652191          Heyendaalseweg 135
                              6525 AJ  Nijmegen,  The Netherlands
e-mail:  wes at hef.ru.nl       or   Wesley.Metzger at cern.ch
http://home.cern.ch/metzger/ or   http://www.hef.ru.nl/~wes