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  2. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space (4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  3. Duocylinder - Wikipedia

    en.wikipedia.org/wiki/Duocylinder

    Stereographic projection of the duocylinder's ridge (see below), as a flat torus.The ridge is rotating about the xw-plane.. The duocylinder, also called the double cylinder or the bidisc, is a geometric object embedded in 4-dimensional Euclidean space, defined as the Cartesian product of two disks of respective radii r 1 and r 2:

  4. Tesseract - Wikipedia

    en.wikipedia.org/wiki/Tesseract

    The regular complex polytope 4 {4} 2, , in has a real representation as a tesseract or 4-4 duoprism in 4-dimensional space. 4 {4} 2 has 16 vertices, and 8 4-edges. Its symmetry is 4 [4] 2, order 32. It also has a lower symmetry construction, , or 4 {}× 4 {}, with symmetry 4 [2] 4, order 16. This is the symmetry if the red and blue 4-edges are ...

  5. Spherinder - Wikipedia

    en.wikipedia.org/wiki/Spherinder

    The spherinder can be seen as the volume between two parallel and equal solid 2-spheres (3-balls) in 4-dimensional space, here stereographically projected into 3D.. In four-dimensional geometry, the spherinder, or spherical cylinder or spherical prism, is a geometric object, defined as the Cartesian product of a 3-ball (or solid 2-sphere) of radius r 1 and a line segment of length 2r 2:

  6. World line - Wikipedia

    en.wikipedia.org/wiki/World_line

    Unlike the present in Galilean/Newtonian theory, the elsewhere is thick; it is not a 3-dimensional volume but is instead a 4-dimensional spacetime region. Included in "elsewhere" is the simultaneous hyperplane, which is defined for a given observer by a space that is hyperbolic-orthogonal to their world line. It is really three-dimensional ...

  7. Rotations in 4-dimensional Euclidean space - Wikipedia

    en.wikipedia.org/wiki/Rotations_in_4-dimensional...

    The topology of SO(4) is the same as that of the Lie group SO(3) × Spin(3) = SO(3) × SU(2), namely the space where is the real projective space of dimension 3 and is the 3-sphere. However, it is noteworthy that, as a Lie group, SO(4) is not a direct product of Lie groups, and so it is not isomorphic to SO(3) × Spin(3) = SO(3) × SU(2) .

  8. National Geographic built 'Space Projection Helmets' for its ...

    www.aol.com/news/2018-03-14-one-strange-rock...

    When it came time for National Geographic to build an immersive experience for its new show, One Strange Rock, the network didn't want another virtual reality experience. So it worked together ...

  9. List of four-dimensional games - Wikipedia

    en.wikipedia.org/wiki/List_of_four-dimensional_games

    This is a list of four-dimensional games—specifically, a list of video games that attempt to represent four-dimensional space. Games Title ... free C++: 2D sections: No