**Category: Escape-time Fractal**

A function originally designed by me for FRACTINT. As shown by the iteration command 'z:=cos(z)*z^2+c' it is a variant of the Mandelbrot set.

> # BIOMORPH2 > # Based on a Maple V algorithm taken from the book > # 'Maple V - Programming Guide' by M.B. Monagan, > # K.O. Geddes, G. Labahn and S. Vorkoetter, > # Springer Verlag, modified by John Oprea > # > # modification of initialization and iteration by Alexander F. Walz > # May 22, 1996 > # > biomorph2:=proc(x, y) > local z, m, c; > z:=evalf(x+y*I); > c:=z; > m:=0; > to 100 while abs(z) < 4 do > z:=cos(z)*z^2+c; > m:=m+1; > od; > m; > end: > plot3d(0, -2 .. 2, -1.5 .. 1.5, orientation=[-90,0], grid=[250, 250], > style=patchnogrid, scaling=constrained, color=biomorph2);

*MAPLE V FRACTALS BIOM2 #1.00 current as of July 27, 1996
Author: Alexander F. Walz, alexander.f.walz@t-online.de
Original file location: http://www.math.utsa.edu/mirrors/maple/mfrbio.htm*