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What (who) is E7½ - definition
E7½
SUBALGEBRA OF E8 CONTAINING E7
E7 1/2; E7½ (Lie algebra); E71/2; E71/2 (Lie algebra); Sextonion; E 7.5; E7.5
In mathematics, the Lie algebra E7½ is a subalgebra of E8 containing E7 defined by Landsberg and Manivel in order
E7 (mathematics)
![root poset]] with edge labels identifying added simple root position](https://commons.wikimedia.org/wiki/Special:FilePath/E7HassePoset.svg?width=200 "root poset]] with edge labels identifying added simple root position")
133-DIMENSIONAL EXCEPTIONAL SIMPLE LIE GROUP
E₇; E7 Lie algebra
In mathematics, E7 is the name of several closely related Lie groups, linear algebraic groups or their Lie algebras e7, all of which have dimension 133; the same notation E7 is used for the corresponding root lattice, which has rank 7. The designation E7 comes from the Cartan–Killing classification of the complex simple Lie algebras, which fall into four infinite series labeled An, Bn, Cn, Dn, and five exceptional cases labeled E6, E7, E8, F4, and G2.
E7 European long distance path
The E7 European long distance path or E7 path is one of the European long-distance paths from the Portuguese-Spanish border eastwards through Andorra, France, Italy, Slovenia, Hungary and Serbia. It is projected to be extended to Lisbon and into Romania, so that it reaches from the Atlantic to the Black Sea, however these stages, as well as parts of the route through Italy, are still in planning.
Examples of use of E7½
1. But it‘s unclear when the E7 might hit the market, if at all.
2. McAULEY London E7 Sir, Martin Samuel is right to criticise local authorities, including the London Borough of Newham, for their approach to supermarkets and small businesses.
3. Russia, which is expected to undergo the worst demographic crisis among the E7 countries, is not expected to approach the size of France‘s economy until 2050, PwC said.
4. The banking sector will grow significantly faster than GDP in the E7 group of emerging economies, consisting China, India, Brazil, Russia, Indonesia, Mexico and Turkey, according to a projection by accounting firm PricewaterhouseCoopers.
5. The angular E7 _ nicknamed the "Machine" _ evokes images of "Robo Cop." Its bells and whistles include flashers built into the car‘s body for aerodynamics to the twin–turbo diesel engine said to use 40 percent less fuel than Crown Victorias.