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  2. Möbius strip - Wikipedia

    en.wikipedia.org/wiki/Möbius_strip

    Cutting this double-twisted strip again along its centerline produces two linked double-twisted strips. If, instead, a Möbius strip is cut lengthwise, a third of the way across its width, it produces two linked strips. One of the two is a central, thinner, Möbius strip, while the other has two half-twists. [6]

  3. Seifert surface - Wikipedia

    en.wikipedia.org/wiki/Seifert_surface

    This is an annulus, not a Möbius strip. It has two half-twists and is thus orientable. The standard Möbius strip has the unknot for a boundary but is not a Seifert surface for the unknot because it is not orientable. The "checkerboard" coloring of the usual minimal crossing projection of the trefoil knot gives a Mobius strip with three half ...

  4. Tietze's graph - Wikipedia

    en.wikipedia.org/wiki/Tietze's_graph

    In the mathematical field of graph theory, Tietze's graph is an undirected cubic graph with 12 vertices and 18 edges. It is named after Heinrich Franz Friedrich Tietze, who showed in 1910 that the Möbius strip can be subdivided into six regions that all touch each other – three along the boundary of the strip and three along its center line – and therefore that graphs that are embedded ...

  5. Surface (topology) - Wikipedia

    en.wikipedia.org/wiki/Surface_(topology)

    The Möbius strip is a surface on which the distinction between clockwise and counterclockwise can be defined locally, but not globally. In general, a surface is said to be orientable if it does not contain a homeomorphic copy of the Möbius strip; intuitively, it has two distinct "sides". For example, the sphere and torus are orientable, while ...

  6. Talk:Möbius strip - Wikipedia

    en.wikipedia.org/wiki/Talk:Möbius_strip

    The umbilic torus has a boundary that, if you cut along the ridges, is a Möbius strip. It is a Möbius strip embedded with three half-twists rather than one, but that is still a Möbius strip. — David Eppstein ( talk ) 10:15, 23 September 2023 (UTC) [ reply ]

  7. Klein bottle - Wikipedia

    en.wikipedia.org/wiki/Klein_bottle

    A two-dimensional representation of the Klein bottle immersed in three-dimensional space. In mathematics, the Klein bottle (/ ˈ k l aɪ n /) is an example of a non-orientable surface; that is, informally, a one-sided surface which, if traveled upon, could be followed back to the point of origin while flipping the traveler upside down.

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  9. Fiber bundle construction theorem - Wikipedia

    en.wikipedia.org/wiki/Fiber_bundle_construction...

    The Möbius strip can be constructed by a non-trivial gluing of two trivial bundles on open subsets U and V of the circle S 1.When glued trivially (with g UV =1) one obtains the trivial bundle, but with the non-trivial gluing of g UV =1 on one overlap and g UV =-1 on the second overlap, one obtains the non-trivial bundle E, the Möbius strip.