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  2. Wingtip device - Wikipedia

    en.wikipedia.org/wiki/Wingtip_device

    The Ha 137 prototype aircraft, fitted with vertical wing extensions, c.1935–1937. The initial concept dates back to 1897, when English engineer Frederick W. Lanchester patented wing end-plates as a method for controlling wingtip vortices. [3]

  3. Standard ML - Wikipedia

    en.wikipedia.org/wiki/Standard_ML

    Standard ML (SML) is a general-purpose, high-level, modular, functional programming language with compile-time type checking and type inference.It is popular for writing compilers, for programming language research, and for developing theorem provers.

  4. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  5. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    In mathematics, the Fibonacci sequence is a sequence in which each element is the sum of the two elements that precede it. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted F n .

  6. 8.8 cm Flak 18/36/37/41 - Wikipedia

    en.wikipedia.org/wiki/8.8_cm_Flak_18/36/37/41

    Mod 1938 II: Approximately 50 guns were modified so a single man could adjust the elevation and traverse. 8.8 cm Flak 36 Entered service 1936–37. It used the redesigned trailer Sonderanhänger 202 which enabled a faster time into action from the move. The SdAnh 202 had twin wheels on two similar carriages. It could engage ground targets from ...

  7. Chaos theory - Wikipedia

    en.wikipedia.org/wiki/Chaos_theory

    This attractor results from a simple three-dimensional model of the Lorenz weather system. The Lorenz attractor is perhaps one of the best-known chaotic system diagrams, probably because it is not only one of the first, but it is also one of the most complex, and as such gives rise to a very interesting pattern that, with a little imagination ...

  8. French language - Wikipedia

    en.wikipedia.org/wiki/French_language

    French (français ⓘ or langue française [lɑ̃ɡ fʁɑ̃sɛːz] ⓘ) is a Romance language of the Indo-European family.Like all other Romance languages, it descended from the Vulgar Latin of the Roman Empire.

  9. Scuba diving - Wikipedia

    en.wikipedia.org/wiki/Scuba_diving

    Recreational scuba diver The undersea kelp forest of Anacapa Island off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1]