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-
- This application is built around the Mandelbrot program by Andrew Fedonczuk
- as published in the March '88 Acorn User.
- Significant modifications and extensions make the program much more usable
- and interesting.
- Firstly, the machine code multiplication routines have been enhanced by
- Alexander ten Have so that the calculations are much more precise and it is
- possible to zoom twice as deep.
-
- When in the process of zooming deeper into the set it is now possible to
- adapt the number of iterations ( called DEPTH on screen ).
-
- It is possible to choose between modes 13, 15 and 24.
-
- Instead of z^2+c as iteration formula it is also possible to iterate
- with a*z^4+b*z^3+c*z^2+d where a,b and c are positive integers, thus
- leading to very interesting pictures and phenomena that are not possible
- with the standard set.
- The option of the standard set is - though superfluous - kept as a
- separate one in the initial menu for sake of simplicity and a small
- gain in speed.
- In the case of higher powers in the iteration formula there is a sort
- of calculation noise in the picture. This can hardly be avoided (the seeds
- of this noise were already in the original program but because of the
- simplicity of the formula this noise did not show up). One should not pay
- attention to it as it is not present in the immediate neighbourhood of the
- (generalised) Mandelbrot set; exploring the structure of it is without
- mathematical significance!
-
- I do not believe that adding more powers of z to the iteration formula
- would lead to much more interesting results. However if someone is of a
- different opinion and is not able to adapt the program himself he can
- write to the address below or call or leave a message on the mentioned
- BBSes.
- People who discover bugs, BEMs or worse should do the same.
-
- Finally I want to express my thanks to Andrew Fedonczuk and
- Alexander ten Have for their original work and offer my excuse for
- presenting this program to the public without consulting them. I have
- not been able to obtain their addresses so I would be grateful if someone
- could supply me with means of contacting them.
-
-
- Frits Ferwerda (#174 on Arcade and Archive, #130 on World of Cryton)
- Piet Heinstraat 83
- 9726 JT Groningen
- The Netherlands
- tel. 050-126455
-