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- Newsgroups: sci.fractals
- Path: sparky!uunet!spool.mu.edu!uwm.edu!linac!uchinews!machine!gagme!gagme!modus
- From: modus@gagme.chi.il.us (Patrick M. Kane)
- Subject: Newton's Method
- Message-ID: <1992Nov8.221326.11267@gagme.chi.il.us>
- Originator: modus@gagme
- Lines: 17
- Sender: modus@gagme.chi.il.us (Patrick M. Kane)
- Organization: Gagme Public Access UNIX, Chicago, Illinois.
- Date: Sun, 8 Nov 1992 22:13:26 GMT
-
- I recently read the book FRACTAL PROGRAMMING IN PASCAL and have a question
- relating to the generation of Newton's Method fractals. The following code
- fragment iterates the equation z^3-1=0 :
- xsquare= x * x
- ysquare = y * y
- denom = 3 * ((xsquare - ysquare) * (xsquare - yswaure) - 4 * xsquare *
- ysquare)
- IF denom = 0 then denom = 0.0000001
- x = (2/3) * x + (xsquare - ysquare) / denom
- y = (2/3) * y - (2 * x * y) / denom
-
- This does, of course, work beautifully. However, with my high school calculus
- skills, I am unable to understand WHY. Could someone please e-mail or post a
- step by step explanation of each part of the above fragment? Any help is
- appreciated.
-
- Patrick Kane
-