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The question of what groups are extensions of by is called the extension problem, and has been studied heavily since the late nineteenth century.As to its motivation, consider that the composition series of a finite group is a finite sequence of subgroups {}, where each {+} is an extension of {} by some simple group.
Just as the Poincaré algebra generates the Poincaré group of isometries of Minkowski space, the super-Poincaré algebra, an example of a Lie super-algebra, generates what is known as a supergroup. This can be used to define superspace with N {\displaystyle {\mathcal {N}}} supercharges: these are the right cosets of the Lorentz group within ...
Telegram Messenger, commonly known as Telegram, is a cloud-based, cross-platform, social media and instant messaging (IM) service. It was originally launched for iOS on 14 August 2013 and Android on 20 October 2013. It allows users to exchange messages, share media and files, and hold private and group voice or video calls as well as public ...
1st spinoff and collaboration of the R&B/Pop group New Edition. The band was created by chance suggested by Ralph Tresvant as well as Jimmy Jam & Terry Lewis as a way to venture off to solo endeavors as Ralph Tresvant, Johnny Gill and Bobby Brown already reached solo success. The name derives off their respective last names.
The concept of supergroup is a generalization of that of group. In other words, every supergroup carries a natural group structure, but there may be more than one way to structure a given group as a supergroup. A supergroup is like a Lie group in that there is a well defined notion of smooth function defined on them. However the functions may ...
A telegraph code is one of the character encodings used to transmit information by telegraphy. Morse code is the best-known such code.Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that.
The average length of a telegram in the 1900s in the US was 11.93 words; more than half of the messages were 10 words or fewer. [5] According to another study, the mean length of the telegrams sent in the UK before 1950 was 14.6 words or 78.8 characters. [6] For German telegrams, the mean length is 11.5 words or 72.4 characters. [6]
N-Triples is a format for storing and transmitting data. It is a line-based, plain text serialisation format for RDF (Resource Description Framework) graphs, and a subset of the Turtle (Terse RDF Triple Language) format.