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- Path: sparky!uunet!srvr1.engin.umich.edu!saimiri.primate.wisc.edu!ames!agate!physics1!ted
- From: ted@physics1 (Emory F. Bunn)
- Newsgroups: sci.physics
- Subject: How to write integrals (was Re: The confusion of tongues (was ...))
- Followup-To: sci.physics
- Date: 21 Jan 1993 20:38:23 GMT
- Organization: Physics Department, U.C. Berkeley
- Lines: 26
- Sender: ted@physics.berkeley.edu
- Distribution: usa
- Message-ID: <1jn1jv$k1c@agate.berkeley.edu>
- References: <1jd41cINNdh4@gap.caltech.edu> <1jlhucINNrtj@darkstar.UCSC.EDU> <COLUMBUS.93Jan21101415@strident.think.com>
- NNTP-Posting-Host: physics1.berkeley.edu
-
- In article <COLUMBUS.93Jan21101415@strident.think.com> columbus@strident.think.com (Michael Weiss) writes:
-
- >On the topic of mathematicians' vs. physicists' notation, does anyone know
- >why most mathematicians will write an integral as shown below on the left
- >(unless they omit the dummy variable x entirely), whereas physicists prefer
- >the form on the right?
- >
- > / /
- > | f(x) dx | dx f(x)
- > / /
- >
-
- This is an interesting question. I sometimes write one and sometimes the
- other. In general, I write \int f(x) dx if I'm just doing a single integral
- (\int is an integral sign, for those who don't TeX), but if it's a multiple
- integral, then I write
-
- \int dx \int dy f(x,y)
-
- I think that the reason I usually put the dx at the end is that that's
- the way it was in my first calculus textbook, and the reason I put the
- dx next to the integral sign in multiple integrals is that it makes it
- instantly clear which integral sign (and hence which limits of integration)
- go with which variable.
-
- -Ted
-