home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!spool.mu.edu!uwm.edu!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!sundar
- From: sundar+@cs.cmu.edu (Sundar Vallinayagam)
- Newsgroups: sci.math
- Subject: Re: What is the 'sinc' function?
- Keywords: sinc
- Message-ID: <C0qxw3.Ew.1@cs.cmu.edu>
- Date: 12 Jan 93 15:04:33 GMT
- Article-I.D.: cs.C0qxw3.Ew.1
- References: <1itehhINN8v1@roundup.crhc.uiuc.edu>
- Sender: news@cs.cmu.edu (Usenet News System)
- Organization: School of Computer Science, Carnegie Mellon
- Lines: 36
- Nntp-Posting-Host: speech1.cs.cmu.edu
-
-
- >I came accross it in a paper about the scattering of electromagnetic
- >radiation.
- >
- >Thanks.
- >
- >Darrell R. Hougen
-
- Here is quote from Preface to the Second Edition of Ron Bracewell's book,
- "The Fourier Transform and its Applications," (2nd edition, revised,
- McGraw-Hill, 1986):
-
- Notation is a vital adjunct to thinking and I am happy to report that
- the _sinc function_, which we learned from P.M. Woodward's book, is alive
- and well and surviving erosion by occasional authors who do not know
- that "sine x over x" is not the sinc function.
-
- Incidentally, the sinc function is sin pi x over pi x. I have seen the
- notation Sa(x) for sine x over x used in other books, but I do not know
- if the latter is standard terminology.
-
- BTW, Bracewell's book is one of the best books on Fourier Transforms, for
- engineers, that is. It has lots and lots of pictures and lends a lot of
- physical insight into the topic. The problems are quite challenging and
- interesting. Anybody else has used this book or taught out of it ?
-
-
-
- ramli.
-
-
-
- --
- **************************************************
- ramli@orca.ele.uri.edu
- **************************************************
-