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In mathematics, E 8 is any of several closely related exceptional simple Lie groups, linear algebraic groups or Lie algebras of dimension 248; the same notation is used for the corresponding root lattice, which has rank 8.
Before writing his 2007 paper, Lisi discussed his work on a Foundational Questions Institute (FQXi) forum, [7] at an FQXi conference, [8] and for an FQXi article. [9] Lisi gave his first talk on E 8 Theory at the Loops '07 conference in Morelia, Mexico, [10] soon followed by a talk at the Perimeter Institute. [11]
The E 8 lattice is a discrete subgroup of R 8 of full rank (i.e. it spans all of R 8).It can be given explicitly by the set of points Γ 8 ⊂ R 8 such that . all the coordinates are integers or all the coordinates are half-integers (a mixture of integers and half-integers is not allowed), and
EMD E8, 1949 diesel passenger train locomotive; European route E8, part of the international E-road network, running between Tromsø, Norway and Turku, Finland; European walking route E8, a walking route from Ireland to Turkey; HMS E8, 1912 British E class submarine; London Buses route E8, runs between Ealing Broadway station and Brentford
The root system has 240 roots. The set just listed is the set of vectors of length √ 2 in the E8 root lattice, also known simply as the E8 lattice or Γ 8. This is the set of points in R 8 such that: all the coordinates are integers or all the coordinates are half-integers (a mixture of integers and half-integers is not allowed), and
Senior chief petty officer (Irish: Ard-Mhion-Oifigeach Sinsearach) is a rank in the Irish Naval Service.The rank is deemed equivalent to a member of the NATO armed forces ranked E-8, making it the equivalent of a senior chief petty officer in the US Navy or a warrant officer class 2 in the Royal Navy.
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The Northrop Grumman E-8 Joint Surveillance Target Attack Radar System (Joint STARS) is a retired United States Air Force (USAF) airborne ground surveillance, battle management and command and control aircraft.