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(*^ ::[paletteColors = 128; fontset = title, "Helvetica", 24, L1, bold, nohscroll; fontset = subtitle, "Helvetica", 10, L1, italic, nohscroll; fontset = subsubtitle, "Helvetica", 10, L1, nohscroll; fontset = section, "Helvetica", 18, L1, bold, nohscroll; fontset = subsection, "Helvetica", 14, L1, bold, nohscroll; fontset = subsubsection, "Times", 14, L1, bold, nohscroll, blackBox; fontset = text, "Times", 12, L1, nohscroll; fontset = smalltext, "Times", 10, L1, nohscroll; fontset = input, "Courier", 10, L1, nowordwrap; fontset = output, "Courier", 10, L2, nowordwrap; fontset = message, "Helvetica", 10, L1, nowordwrap; fontset = print, "Helvetica", 10, L1, nowordwrap; fontset = info, "Helvetica", 10, L1, nowordwrap; fontset = postscript, "Helvetica", 10, L1, nowordwrap; fontset = name, "Helvetica", 9, L1, italic, nohscroll; fontset = header, "Helvetica", 10, L1, nohscroll; fontset = footer, "Helvetica", 10, L1, nohscroll; fontset = help, "Helvetica", 10, L1, nohscroll; fontset = clipboard, "Helvetica", 10, L1, nohscroll; fontset = completions, "Helvetica", 10, L1, nohscroll; fontset = network, "Courier", 10, L2, nowordwrap; fontset = graphlabel, "Courier", 12, L2, nowordwrap; fontset = special1, "Helvetica", 18, L1, bold, nohscroll; fontset = special2, "Helvetica", 14, L1, bold, nohscroll; fontset = special3, "Times", 14, L1, bold, nohscroll, blackBox; fontset = special4, "Helvetica", 10, L1, nohscroll; fontset = special5, "Helvetica", 10, L1, nohscroll;] :[font = title; inactive; noPageBreak; ] Fractals :[font = subtitle; inactive; noPageBreak; ] Joe N. Gregg :[font = subsubtitle; inactive; noPageBreak; ] Department of Mathematics Columbia University New York, NY 10027 :[font = subsection; inactive; startGroup; noPageBreak; ] The Koch Triangle :[font = text; inactive; noPageBreak; ] Another example of a fractal set is the Koch triangle. This figure starts with an equilateral triangle. At each iteration we replace every line segment in the figure with a broken line segment in four parts of a length that is 1/3 the length of the former line segment. :[font = postscript; inactive; PICT; pictureID = 6190; output; pictureWidth = 243; pictureHeight = 223; noPageBreak; center; ] :[font = subsection; inactive; startGroup; noPageBreak; ] The Henon Map :[font = text; inactive; noPageBreak; ] The Henon map is an example of a map in several dimensions (two) that has a strange attractor. :[font = postscript; inactive; PICT; pictureID = 15067; output; endGroup; endGroup; pictureWidth = 259; pictureHeight = 193; noPageBreak; thinLines; center; ] ^*)