File:WeierstrassSubstitution.svg
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Original file (SVG file, nominally 345 × 210 pixels, file size: 7 KB)
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Summary
| Description |
English: Stereographic projection of the unit circle onto a line through the center illustrating the change in the length element for the Weierstrass substitution article. Created in Mathematica (see code below) and post-processed in Inkscape (fit page to selection) to correct aspect ratio. |
| Date | |
| Source | Own work |
| Author | Sławomir Biały |
Code:
x[t_]=2t/(t^2+1);
y[t_]=(t^2-1)/(t^2+1);
t[x_,y_]=x/(1-y);
Simplify[t[x[t],y[t]]]
circ[t_]={Cos[t],Sin[t]};
\[Theta]0=\[Pi]/6;
\[Theta]1=\[Pi]/6-1/5;
{x0,y0}=circ[\[Theta]0];
{x1,y1}=circ[\[Theta]1];
Graphics[
{Hue[0.7],Thickness[0.001],
Circle[{0,0},1],
Line[{{-1.2,0},{2,0}}],
Hue[0.55],PointSize[0.01],Point[{0,1}],
Point[{x0,y0}],
Point[{x1,y1}],
Point[{t[x0,y0],0}],
Point[{t[x1,y1],0}],
Line[{{0,1},{t[x0,y0],0}}],
Line[{{0,1},{t[x1,y1],0}}],
Thickness[0.0035],Hue[0.05],
Circle[{0,0},1,{\[Theta]1,\[Theta]0}],
Line[{{t[x0,y0],0},{t[x1,y1],0}}],
Dashed,Hue[0.7],Thickness[0.001],
Line[{{0,0},circ[\[Pi]/6-1/10]}],
Circle[{0,0},1/3,{0,\[Pi]/6-1/10}],
Text[x,(1/2.5)circ[\[Pi]/6-1/4]],
Text[t,{2.1,0}],
Text[dt,{t@@circ[\[Pi]/6-1/10],-0.11}],
Text[dx,(circ[\[Pi]/6-1/10]+{0.1,0})]
}
]
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:24, 4 February 2011 | | 345 × 210 (7 KB) | Sławomir Biały | Resized. Tried to fix aspect ratio. |
| 13:20, 4 February 2011 |  | 512 × 512 (3 KB) | Sławomir Biały | {{Information |Description ={{en|1=Stereographic projection of the unit circle onto a line through the center illustrating the change in the length element for the Weierstrass substitution article. Created in mathematica.}} |Source ={{own} |
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