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  2. Parallel universes in fiction - Wikipedia

    en.wikipedia.org/wiki/Parallel_universes_in_fiction

    Time travel can result in multiple universes if a time traveller can change the past. In one interpretation, alternative histories as a result of time travel are not parallel universes: while multiple parallel universes can co-exist simultaneously, only one history or alternative history can exist at any one moment, as alternative history usually involves, in essence, overriding the original ...

  3. Two-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Two-dimensional_space

    Two-dimensional spaces can also be curved, for example the sphere and hyperbolic plane, sufficiently small portions of which appear like the flat plane, but on which straight lines which are locally parallel do not stay equidistant from each-other but eventually converge or diverge, respectively.

  4. Parallel universe - Wikipedia

    en.wikipedia.org/wiki/Parallel_universe

    Parallel universes in fiction, a hypothetical self-contained plane of existence, co-existing with one's own Alternate history , a genre of fiction in which historical events differ from reality Alternative universe (fan fiction) , fiction by fan authors that departs from the fictional universe of the source work

  5. Manual of the Planes - Wikipedia

    en.wikipedia.org/wiki/Manual_of_the_Planes

    The 4th Edition Manual of the Planes reinvented the cosmology into a streamlined arrangement called the World Axis cosmology. [7] It consists of five core types of planes: 1. The Mortal World; 2. The Parallel Planes – two planes that are linked to the Mortal World Feywild (Plane of Faerie) Shadowfell (Plane of Shadow) 3.

  6. Euclidean planes in three-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Euclidean_planes_in_three...

    Two distinct planes are either parallel or they intersect in a line. A line is either parallel to a plane, intersects it at a single point, or is contained in the plane. Two distinct lines perpendicular to the same plane must be parallel to each other. Two distinct planes perpendicular to the same line must be parallel to each other.

  7. Viewing frustum - Wikipedia

    en.wikipedia.org/wiki/Viewing_frustum

    A view frustum The appearance of an object in a pyramid of vision When creating a parallel projection, the viewing frustum is shaped like a box as opposed to a pyramid.. In 3D computer graphics, a viewing frustum [1] or view frustum [2] is the region of space in the modeled world that may appear on the screen; it is the field of view of a perspective virtual camera system.

  8. 23 examples of amazing camouflage on military planes - AOL

    www.aol.com/article/2016/03/25/23-examples-of...

    Just like their sister branches on the ground, air forces around the world constantly seek to change and improve the camouflages they use. 23 examples of amazing camouflage on military planes Skip ...

  9. Category:Television series about parallel universes - Wikipedia

    en.wikipedia.org/wiki/Category:Television_series...

    Pages in category "Television series about parallel universes" The following 91 pages are in this category, out of 91 total. This list may not reflect recent changes .