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Grafika:KleinBottle-01.png - Wikipedia, wolna encyklopedia

Grafika:KleinBottle-01.png

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Contents

[edit] Summary

Standard immersion of a Klein bottle into R3. Made with Mathematica.

[edit] See also

Image:Klein bottle.svg

[edit] Licensing

Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.


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[edit] Parameterization

This immersion of the Klein bottle into R3 is given by the following parameterization. Here the parameters u and v run from 0 to 2π and r is a fixed positive constant.

For 0 \leq u < \pi:

x = 6 \cos u(1 + \sin u) + 4r\left(1 - \frac{\cos u}{2}\right) \cos u \cos v
y = 16 \sin u + 4r\left(1 - \frac{\cos u}{2}\right) \sin u \cos v
z = 4r\left(1 - \frac{\cos u}{2}\right) \sin v

For \pi \leq u < 2\pi:

x = 6 \cos u(1 + \sin u) - 4r\left(1 - \frac{\cos u}{2}\right) \cos v
y = 16 \sin u\,
z = 4r\left(1 - \frac{\cos u}{2}\right) \sin v

[edit] Mathematica source

KleinBottle[r_:1] =
 Function[{u, v},
   UnitStep[Sin[u]]
   {
       6 Cos[u](1 + Sin[u]) + 4r(1 - Cos[u]/2) Cos[u]Cos[v],
       16 Sin[u] + 4r(1 - Cos[u]/2) Sin[u]Cos[v],
       4r(1 - Cos[u]/2) Sin[v]
   }
   + (1 - UnitStep[Sin[u]])
   {
       6 Cos[u](1 + Sin[u]) - 4r(1 - Cos[u]/2) Cos[v],
       16 Sin[u],
       4r(1 - Cos[u]/2) Sin[v]
   }
 ]

 ParametricPlot3D[Evaluate[KleinBottle[][u, v]], {u, 0, 2Pi}, {v, 0, 2Pi},
   PlotPoints -> {50, 19}, Boxed -> False, Axes -> False,
   ViewPoint -> {0.454, -2.439, -2.301}]

Historia pliku

Kliknij na datę/czas, aby zobaczyć, jak plik wyglądał w tym czasie.

Data/czasWymiaryUżytkownikOpis
aktualny01:39, 13 gru 2006240×300 (64 kB)Mahahahaneapneap (pngcrushed)
12:21, 15 wrz 2006240×300 (77 kB)Dark knight (Added transparency, unfortunately dimension rose)
04:23, 4 mar 2005240×300 (57 kB)Dbenbenn (losslessly compressed with pngcrush, 20% smaller)
19:44, 3 mar 2005240×300 (71 kB)Fropuff (Standard immersion of a Klein bottle. {{PD}})

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