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  2. Lists of uniform tilings on the sphere, plane, and hyperbolic ...

    en.wikipedia.org/wiki/Lists_of_uniform_tilings...

    Special cases are right triangles (p q 2). Uniform solutions are constructed by a single generator point with 7 positions within the fundamental triangle, the 3 corners, along the 3 edges, and the triangle interior. All vertices exist at the generator, or a reflected copy of it. Edges exist between a generator point and its image across a mirror.

  3. Skybox (video games) - Wikipedia

    en.wikipedia.org/wiki/Skybox_(video_games)

    A skybox is a method of creating backgrounds to make a video game level appear larger than it really is. [1] When a skybox is used, the level is enclosed in a cuboid.The sky, distant mountains, distant buildings, and other unreachable objects are projected onto the cube's faces (using a technique called cube mapping), thus creating the illusion of distant three-dimensional surroundings.

  4. SourceForge - Wikipedia

    en.wikipedia.org/wiki/SourceForge

    SourceForge is a web service founded by Geoffrey B. Jeffery, Tim Perdue, and Drew Streib in November 1999. The software provides a centralized online platform for managing and hosting open-source software projects, and a directory for comparing and reviewing business software that lists over 101,600 business software titles.

  5. Spherical harmonics - Wikipedia

    en.wikipedia.org/wiki/Spherical_harmonics

    As a result, the sum of these spaces is also dense in the space L 2 (S n−1) of square-integrable functions on the sphere. Thus every square-integrable function on the sphere decomposes uniquely into a series of spherical harmonics, where the series converges in the L 2 sense.

  6. YIG sphere - Wikipedia

    en.wikipedia.org/wiki/YIG_sphere

    Simplified schematics of YIG-resonator coupling to microstrip network YIG filter partially disassembled. The electromagnet is on the left. The module with YIG sphere and input and output coils is on the right. Yttrium iron garnet spheres (YIG spheres) serve as magnetically tunable filters and resonators for microwave frequencies.

  7. 3-sphere - Wikipedia

    en.wikipedia.org/wiki/3-sphere

    Direct projection of 3-sphere into 3D space and covered with surface grid, showing structure as stack of 3D spheres (2-spheres) In mathematics, a hypersphere or 3-sphere is a 4-dimensional analogue of a sphere, and is the 3-dimensional n-sphere. In 4-dimensional Euclidean space, it is the set of points equidistant from a fixed central point.

  8. Integrating sphere - Wikipedia

    en.wikipedia.org/wiki/Integrating_sphere

    Large integrating sphere for measurement on light bulbs and small lamps. An integrating sphere (also known as an Ulbricht sphere) is an optical component consisting of a hollow spherical cavity with its interior covered with a diffuse white reflective coating, with small holes for entrance and exit ports.

  9. Ewald's sphere - Wikipedia

    en.wikipedia.org/wiki/Ewald's_sphere

    The Ewald sphere is a geometric construction used in electron, neutron, and x-ray diffraction which shows the relationship between: the wavevector of the incident and diffracted beams, the diffraction angle for a given reflection, the reciprocal lattice of the crystal. It was conceived by Paul Peter Ewald, a German physicist and ...