[Date Index] [Thread Index] [Author Index]

Martin Map (a.k.a. hopalong).

• To: mathgroup at smc.vnet.net
• Subject: [mg52278] Martin Map (a.k.a. hopalong).
• From: Roger Bagula <tftn at earthlink.net>
• Date: Sat, 20 Nov 2004 03:41:56 -0500 (EST)
• Reply-to: tftn at earthlink.net
• Sender: owner-wri-mathgroup at wolfram.com

I only found one concrete link to this map on the web:
http://www.flex.com/~dimai/hopmarti.html

Clear[x,y,a,b,s,g,a0]
(* Martin map*)
b0=Cos[Pi/4]/(1.+Sqrt[3]/10  );
c0=Cos[Pi/4]/(1.+Sqrt[3]/10  );s=-1;
digits=10000;
x[n_]:=x[n]=y[n-1]+s*Sign[x[n-1]]*Sqrt[Abs[b0*x[n-1]+c0]]
y[n_]:=y[n]=1-x[n-1]
x[0]=.6135;y[0]=.6135;
a=Table[{x[n],y[n]},{n,0, digits}];
ListPlot[a, PlotRange->All]


Respectfully, Roger L. Bagula

tftn at earthlink.net, 11759Waterhill Road, Lakeside,Ca 92040-2905,tel: 619-5610814 :
alternative email: rlbtftn at netscape.net
URL :  http://home.earthlink.net/~tftn