Encyclopedia : 1 : 1N : 1NE (5 articles)

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1/N expansion
In quantum field theory and statistical mechanics, the 1/N expansion is a particular perturbative analysis of quantum field theories with an SO(N) or SU(N) internal symmetry. This technique is used in QCD (even though N is only 3 there) with the gauge group SU(3). Another application is to the stu..
1 (New York City Subway service)
For the former BMT services, see BMT 1 and BMT 9. The 1 Broadway–Seventh Avenue Local is a service of the New York City Subway. It is colored red since, it uses the IRT Broadway-Seventh Avenue Line, which it follows for its entire route. For more information on the line, including history, s..

 

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