Image:Isospectral drums.png

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Isospectral_drums.png‎ (4KB, MIME type: image/png)

Two drums with these shapes have the same harmonics. See Hearing the shape of a drum for details.

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This picture is produced by the following XFig file:

#FIG 3.2  Produced by xfig version 3.2.5-alpha5
Landscape
Center
Metric
A4      
100.00
Single
-2
1200 2
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         450 1800 450 0
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         900 0 900 1800
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         1350 1800 1350 0
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         1800 0 1800 1800
2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
         225 1800 2025 1800
2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
         225 1800 225 0
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         225 225 2025 225
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
         225 675 2025 675
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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         1800 675 900 675 900 225
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         1800 675 900 675 900 225
2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
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2 1 0 1 0 7 50 -1 -1 0.000 0 0 -1 0 0 2
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2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 0 0 2
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4 1 0 50 -1 0 12 0.0000 4 135 105 450 2025 0\001
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4 1 0 50 -1 0 12 0.0000 4 135 105 1350 2025 2\001
4 1 0 50 -1 0 12 0.0000 4 150 105 1800 2025 3\001
4 2 0 50 -1 0 12 0.0000 4 135 105 180 1620 0\001
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4 2 0 50 -1 0 12 0.0000 4 135 105 180 720 2\001
4 2 0 50 -1 0 12 0.0000 4 150 105 180 270 3\001
4 1 0 50 -1 0 12 0.0000 4 135 105 2700 2025 0\001
4 1 0 50 -1 0 12 0.0000 4 150 105 3150 2025 1\001
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4 1 0 50 -1 0 12 0.0000 4 150 105 4050 2025 3\001
4 2 0 50 -1 0 12 0.0000 4 135 105 2430 1620 0\001
4 2 0 50 -1 0 12 0.0000 4 150 105 2430 1170 1\001
4 2 0 50 -1 0 12 0.0000 4 135 105 2430 720 2\001
4 2 0 50 -1 0 12 0.0000 4 150 105 2430 270 3\001

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