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The 112 roots with integer entries form a D 8 root system. The E 8 root system also contains a copy of A 8 (which has 72 roots) as well as E 6 and E 7 (in fact, the latter two are usually defined as subsets of E 8). In the odd coordinate system, E 8 is given by taking the roots in the even coordinate system and changing the sign of any one ...
The root system E 7 is the set of vectors in E 8 that are perpendicular to a fixed root in E 8. The root system E 7 has 126 roots. The root system E 6 is not the set of vectors in E 7 that are perpendicular to a fixed root in E 7, indeed, one obtains D 6 that way. However, E 6 is the subsystem of E 8 perpendicular to two suitably chosen roots ...
E 8, an exceptional simple Lie group with root lattice of rank 8; E 8 lattice, special lattice in R 8; E 8 manifold, mathematical object with no smooth structure or topological triangulation; E 8 polytope, alternate name for the 4 21 semiregular (uniform) polytope; Elementary abelian group of order 8
In E 8 Theory's current state, it is not possible to calculate masses for the existing or predicted particles. Lisi states the theory is young and incomplete, requiring a better understanding of the three fermion generations and their masses, and places a low confidence in its predictions.
The name derives from the fact that it is the root lattice of the E 8 root system. The norm [1] of the E 8 lattice (divided by 2) is a positive definite even unimodular quadratic form in 8 variables, and conversely such a quadratic form can be used to construct a positive-definite, even, unimodular lattice of rank 8.
Multivac is a fictional supercomputer appearing in over a dozen science fiction stories by American writer Isaac Asimov.Asimov's depiction of Multivac, a mainframe computer accessible by terminal, originally by specialists using machine code and later by any user, and used for directing the global economy and humanity's development, has been seen as the defining conceptualization of the genre ...
Several stories within the One Thousand and One Nights (Arabian Nights, 8th–10th centuries CE) also feature science fiction elements.One example is "The Adventures of Bulukiya", where the protagonist Bulukiya's quest for the herb of immortality leads him to explore the seas, journey to the Garden of Eden and to Jahannam (Islamic hell), and travel across the cosmos to different worlds much ...
The term "droid", popularized by George Lucas in the original Star Wars film and now used widely within science fiction, originated as an abridgment of "android", but has been used by Lucas and others to mean any robot, including distinctly non-human form machines like R2-D2.