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- Path: sparky!uunet!mcsun!uknet!newcastle.ac.uk!eata!n211552
- From: A.M.Wall@newcastle.ac.uk (A.M.Wall)
- Newsgroups: sci.math
- Subject: Re: Apology about f'(g(x))
- Message-ID: <BxLtv5.93H@newcastle.ac.uk>
- Date: 12 Nov 92 13:09:04 GMT
- References: <Bx521s.MrM@watdragon.uwaterloo.ca> <Bx5EJD.CtG@unix.amherst.edu> <3NOV199214312961@venus.tamu.edu>
- Organization: University of Newcastle upon Tyne, UK NE1 7RU
- Lines: 11
- Nntp-Posting-Host: eata
-
- So you are all arguing about the following:
-
- df
- Is f' a function, with value --, or does f'(y) mean "take f and differentiate
- dx
- wrt y"? The answer is probably that both are perfectly good interpretations,
- but that the former is more widely accepted. If you need to use the latter,
- df(g(x))
- then the full notation -------- is less confusing (whether or not you actually
- dg(x)
- prefer it).
-