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cylinder

A cylinder (from Greek: κύλινδρος, romanized: kulindros, lit. 'roller', 'tumbler') has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. Geometrically, it can be considered as a prism with a circle as its base.
This traditional view is still used in elementary treatments of geometry, but the advanced mathematical viewpoint has shifted to the infinite curvilinear surface and this is how a cylinder is now defined in various modern branches of geometry and topology.
The shift in the basic meaning (solid versus surface) has created some ambiguity with terminology. It is generally hoped that context makes the meaning clear. Both points of view are typically presented and distinguished by referring to solid cylinders and cylindrical surfaces, but in the literature the unadorned term cylinder could refer to either of these or to an even more specialized object, the right circular cylinder.

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Recent contents Top users
  1. T

    Should I Replace Hot-water Cylinder?

    I have a vented hot-water cylinder that was installed when the house was built - 38 years ago! It has a header tank in the loft and the cylinder is located directly above the ceiling of a new and expensive kitchen. It does not leak and causes no obvious problems. Should it be replaced? Advice...
  2. F

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  3. RenzoPan

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  4. papachumba

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  5. papachumba

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  6. nashant

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  7. J

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  8. P

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  9. R

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  10. T

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  11. N

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  12. P

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  13. Z

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  14. S

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    • seanEE
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  15. A

    Gledhill envirofoam stainless cylinder 140ltrs new

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  16. ridgerunner

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  17. R

    Will shower pressure be less if switch to an unvented HW cylinder?

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  18. A

    Vibrating hot water return pipe from indirect cylinder

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  19. dave100

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  20. Z

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