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- Newsgroups: sci.math
- Path: sparky!uunet!stanford.edu!CSD-NewsHost.Stanford.EDU!SAIL.Stanford.EDU!rivin
- From: rivin@SAIL.Stanford.EDU (Igor Rivin)
- Subject: Re: term for the "angle" of a complex number
- Message-ID: <1993Jan12.224554.1037@CSD-NewsHost.Stanford.EDU>
- Sender: news@CSD-NewsHost.Stanford.EDU
- Organization: Computer Science Department, Stanford University.
- References: <C0rFC2.A8@smsc.sony.com>
- Date: Tue, 12 Jan 1993 22:45:54 GMT
- Lines: 22
-
- In article <C0rFC2.A8@smsc.sony.com> markc@smsc.sony.com (Mark Corscadden) writes:
- >A complex number Z can be expressed in these ways:
- >
- >rectangular - X + Yi where X and Y are real
- >polar - R exp(Ai) where R>=0 and A are real (A is not unique)
- >
- >Terminology for these quantities:
- >
- >X - the real part of Z
- >Y - the imaginary part of Z
- >R - the magnitude of Z or the absolute value of Z
- >A - ??? I have no idea ???
- >
- >What do you call "A"? Ideally this would be a term that you could expect
- >to be recognized in a discussion about quantum field theory, for example.
-
- The two terms in wide use are "phase" (polar form is also known as
- phase/magnitude) and "argument". "Phase" is more often used in applied
- mathematics, "argument" in complex function theory.
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