| Construct a cylinder with a slit along a spiral. |
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| Wrap the graph of y = cos 2x around a cylinder. |
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| Place the smooth surface on top on the above surface. |
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| Construct the Monkey's Saddle: |
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| Carve out the Monkey's Saddle out of a solid cylinder: |
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| Construct one-half of a solid cylinder as thus: |
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Construct the region enclosed by the two
cylinders with equation
x2 + z2 = 1 y2 + z2 = 1 |
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| Construct one-half of the above surface as thus |
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| Construct this surface: |
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| Construct this one-half of a solid torus: |
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