File:ZexIteT.jpg

Summary

Title / Description	Iteration of function ArcLambertW, id est zex${\displaystyle (z)=z\exp(z)~}$. For various real values of number ${\displaystyle n}$ of iteration, ${\displaystyle ~y\!=\!\mathrm {zex} ^{n}(x)~}$ is plottecd versus ${\displaystyle x}$.
Citizendium author & Copyright holder	Copyright © Dmitrii Kouznetsov. See below for licence/re-use information.
Date created	2012.11.11
Country of first publication	Japan
Notes	You can edit this page and add notes here which may be useful to people who wish to re-use this media.
Other versions	http://tori.ils.uec.ac.jp/TORI/index.php/File:ZexIteT.jpg
Using this image on CZ	Please click here to add the credit line, then copy the code below to add this image to a Citizendium article, changing the size, alignment, and caption as necessary. {{Image|ZexIteT.jpg|right|350px|Add image caption here.}}

C++ Generator of curves

// Files ado.cin, Tania.cin, LambertW.cin, SuZex.cin, AuZex.cin should be loaded to the working directory in order to compile the code below.

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define DB double
#define DO(x,y) for(x=0;x<y;x++)
using namespace std;
#include<complex>
typedef complex<double> z_type;
#define Re(x) x.real()
#define Im(x) x.imag()
#define I z_type(0.,1.)

#include "Tania.cin" // need for LambertW
#include "LambertW.cin" // need for AuZex
#include "SuZex.cin"
#include "AuZex.cin"
#include "ado.cin"
#define M(x,y) fprintf(o,"%6.4f %6.4f M\n",0.+x,0.+y);
#define L(x,y) fprintf(o,"%6.4f %6.4f L\n",0.+x,0.+y);

main(){ int j,k,m,n; DB x,y, p,q, t; z_type z,c,d;  FILE *o;o=fopen("ZexIte.eps","w");  ado(o,1204,1204);
fprintf(o,"2 2 translate\n 100 100 scale\n");
fprintf(o,"1 setlinejoin 2 setlinecap\n");
for(n=0;n<13;n++) {M(0,n)L(12,n)}
for(m=0;m<13;m++) {M(m,0)L(m,12)}
M(M_E,0)L(M_E,1) M(0,M_E)L(1,M_E)  fprintf(o,".01 W S\n");

DO(m,700){x=.01 +.02*m; y=Re(LambertW(LambertW(x)));if(m==0) M(x,y) else L(x,y) if(x>12.03||y>12.03) break;} fprintf(o,".033 W 1 0 1 RGB S\n");
DO(m,700){x=.01 +.02*m; y=Re(LambertW(x));if(m==0) M(x,y) else L(x,y) if(x>12.03||y>12.03) break;} fprintf(o,".04 W 1 0 1 RGB S\n");
M(0,0) L(12.03,12.03) fprintf(o,".03 W 0 1 0 RGB S\n");
DO(m,700){x=.01 +.02*m; y=Re(zex(x));     if(m==0) M(x,y) else L(x,y) if(x>12.03||y>12.03) break;} fprintf(o,".04 W 0 1 0 RGB S\n");
DO(m,700){x=.01 +.02*m; y=Re(zex(zex(x)));     if(m==0) M(x,y) else L(x,y) if(x>12.03||y>12.03) break;} fprintf(o,".033 W 0 1 0 RGB S\n");

for(n=-10;n<11;n++){
  DO(m,700){x=.01 +.02*m; y=Re(auzex(x)); y=Re(suzex(.1*n+y)); if(m==0) M(x,y) else L(x,y) if(x>12.03||y>12.03) break;}  
  fprintf(o,".023 W 0 0 0 RGB S\n");
                   }
fprintf(o,"showpage\n"); fprintf(o,"%c%cTrailer\n",'%','%');  fclose(o);
      system("epstopdf ZexIte.eps"); 
      system(    "open ZexIte.pdf"); //for macintosh
      getchar(); system("killall Preview"); // For macintosh
}

Latex generator of labels

% %<br> % file ZexIte.pdf should be generated with the code above in order to compile the Latex document below. %<br> % Copyleft 2012 by Dmitrii Kouznetsov <br> % \documentclass[12pt]{article}  % <br> \usepackage{geometry}  % <br> \usepackage{graphicx} % <br> \usepackage{rotating} % <br> \paperwidth 1208pt % <br> \paperheight 1208pt % <br> \topmargin -103pt % <br> \oddsidemargin -73pt % <br> \textwidth 1404pt % <br> \textheight 1404pt % <br> \pagestyle {empty} % <br> \newcommand \sx {\scalebox} % <br> \newcommand \rot {\begin{rotate}} % <br> \newcommand \ero {\end{rotate}} % <br> \newcommand \ing {\includegraphics} % <br> \parindent 0pt% <br> \pagestyle{empty} % <br> \begin{document}  % <br> \begin{picture}(1202,1202) % <br> %\put(10,10){\ing{IterPowPlot}} % <br> %\put(10,10){\ing{IterEq2plot}} % <br> \put(0,0){\ing{ZexIte}} % <br> \put(11,1184){\sx{4.4}{$y$}} % <br> \put(04,1090){\sx{4}{$11$}} % <br> \put(04,990){\sx{4}{$10$}} % <br> \put(11,890){\sx{4}{$9$}} % <br> \put(11,790){\sx{4}{$8$}} % <br> \put(11,690){\sx{4}{$7$}} % <br> \put(11,590){\sx{4}{$6$}} % <br> \put(11,490){\sx{4}{$5$}} % <br> \put(11,390){\sx{4}{$4$}} % <br> \put(11,290){\sx{4}{$3$}} % <br> \put(11,190){\sx{4}{$2$}} % <br> \put(11,090){\sx{4}{$1$}} % <br>  % <br> \put(91,6){\sx{4}{$1$}} % <br> \put(191,6){\sx{4}{$2$}} % <br> \put(291,6){\sx{4}{$3$}} % <br> \put(391,6){\sx{4}{$4$}} % <br> \put(492,6){\sx{4}{$5$}} % <br> \put(592,6){\sx{4}{$6$}} % <br> \put(693,6){\sx{4}{$7$}} % <br> \put(794,6){\sx{4}{$8$}} % <br> \put(894,6){\sx{4}{$9$}} % <br> \put(982,6){\sx{4}{$10$}} % <br> \put(1082,6){\sx{4}{$11$}} % <br> \put(1180,6){\sx{4.4}{$x$}} % <br>  % <br> \put(116,1058){\sx{5}{\rot{88}$n\!=\!2$\ero}} % <br> \put(182,1058){\sx{5}{\rot{88}$n\!=\!1$\ero}} % <br> \put(141,706){\sx{4.5}{\rot{86}$y\!=\!\mathrm{zex}(x)$\ero}} % <br> % \put(512,1030){\sx{5}{\rot{72}$n\!=\!0.3$\ero}} % <br> \put(629,1032){\sx{5}{\rot{64}$n\!=\!0.2$\ero}} % <br> \put(804,1037){\sx{5}{\rot{56}$n\!=\!0.1$\ero}} % <br>  % <br> \put(1072,1052){\sx{5}{\rot{44}$n\!=\!0$\ero}} % <br> \put(772,752){\sx{5}{\rot{44}$y\!=\!x$\ero}} % <br> % <br> \put(1028,762){\sx{5}{\rot{32}$n\!=\!-0.1$\ero}} % <br> \put(1014,590){\sx{5}{\rot{23}$n\!=\!-0.2$\ero}} % <br> \put(1006,470){\sx{5}{\rot{17}$n\!=\!-0.3$\ero}} % <br> % \put(510,108){\sx{4.3}{\rot{3}$y\!=\!\mathrm{LambertW}(x)$\ero}} % <br> \put(1010,142){\sx{5}{\rot{2}$n\!=\!-1$\ero}} % <br> \put(1010,83){\sx{5}{\rot{1}$n\!=\!-2$\ero}} % <br> %<br> \end{picture} % <br> \end{document} % <br> %

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