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  2. Möbius strip - Wikipedia

    en.wikipedia.org/wiki/Möbius_strip

    In mathematics, a Möbius strip, Möbius band, or Möbius loop [a] is a surface that can be formed by attaching the ends of a strip of paper together with a half-twist. As a mathematical object, it was discovered by Johann Benedict Listing and August Ferdinand Möbius in 1858, but it had already appeared in Roman mosaics from the third century CE .

  3. Recycling symbol - Wikipedia

    en.wikipedia.org/wiki/Recycling_symbol

    The SPI symbols are loosely based on the Möbius loop symbol, but feature simpler bent (rather than folded over) arrows that can be embossed on plastic surfaces without loss of detail. The arrows are formed into a flat, two-dimensional triangle rather than the pseudo-three-dimensional triangle used in the original recycling logo.

  4. Dual-tracked roller coaster - Wikipedia

    en.wikipedia.org/wiki/Dual-tracked_roller_coaster

    This is a Möbius loop racing coaster similar to Twisted Colossus, also found at the park. Unlike Twisted Colossus, the racing element is guaranteed, as the train will be held next to the station upon completion of the first half of the loop until the next train is dispatched. Windjammer Surf Racers: Knott's Berry Farm: Buena Park, California ...

  5. Strange loop - Wikipedia

    en.wikipedia.org/wiki/Strange_loop

    A strange loop is a hierarchy of levels, each of which is linked to at least one other by some type of relationship. A strange loop hierarchy is "tangled" (Hofstadter refers to this as a "heterarchy"), in that there is no well defined highest or lowest level; moving through the levels, one eventually returns to the starting point, i.e., the original level.

  6. 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.

  7. Grand National (roller coaster) - Wikipedia

    en.wikipedia.org/wiki/Grand_National_(roller...

    The Grand National is a wooden roller coaster located at Pleasure Beach Resort in Blackpool, Lancashire in the United Kingdom.It was designed and constructed by American engineer Charles Paige in 1935 and is now one of two surviving wooden Möbius Loop roller coasters in the world (the other being the Racer at Kennywood). [1]

  8. Orientability - Wikipedia

    en.wikipedia.org/wiki/Orientability

    A torus is an orientable surface The Möbius strip is a non-orientable surface. Note how the disk flips with every loop. The Roman surface is non-orientable.. In mathematics, orientability is a property of some topological spaces such as real vector spaces, Euclidean spaces, surfaces, and more generally manifolds that allows a consistent definition of "clockwise" and "anticlockwise". [1]

  9. Möbius loop roller coaster - Wikipedia

    en.wikipedia.org/?title=Möbius_loop_roller...

    Pages for logged out editors learn more. Contributions; Talk; Möbius loop roller coaster