Image:Bipolar coordinates.png
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[edit] Summary
Illustration of the bipolar coordinate system. σ is the angle between the two foci and the point in question, whereas τ is the logarithm of the ratio of the distances. The corresponding σ and τ isosurfaces are shown in red and blue, respectively. This image was made by me using Xfig on 24 October 2006 and is licensed under the GFDL.
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File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 14:34, 24 October 2006 | 246×280 (4 KB) | WillowW | (Updated to label the point P. Otherwise, the same as first version.) |
| 14:18, 24 October 2006 | 246×289 (4 KB) | WillowW | (Illustration of the bipolar coordinate system. σ is the angle between the two foci and the point in question, whereas τ is the logarithm of the ratio of the distances. The corresponding σ and τ isosurfaces are shown in red and blue, respectively. T) |
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