mathematical set

SET may stand for:Sanlih Entertainment Television, a television channel in TaiwanSecure electronic transaction, a protocol used for credit card processing,Similarity Enhanced Transfer, a technology used to speed up download rate of files on file sharing networksSimulated Emergency Test, an amateur radio training exercise,Single-Electron Transistor, a device to amplify currents in nanoelectronics,Society for the Eradication of Television,Sony Entertainment Television, a television channel owned by Sony,South Eastern Trains now run by Southeastern, a public-owned rail company operating in South East England,Stock Exchange of Thailand, a national stock exchange of Thailand,SET Index, an index for Stock Exchange of Thailand,Study of Exceptional Talent, a program for gifted students with high scores on the SAT in middle school,Single-Ended Triode, a type of electronic amplifier,Social Entropy Theory, application of entropy concept to maintenace or disorganisation in society,School of Engineering Technology,Selective Employment Tax, a UK tax on non-productive workers introduced in 1966 and abandoned a few years later,Southeast Toyota Distributors, the world's largest privately owned distributor of Toyota vehicles,Suzuki SET (Suzuki Exhaust Tuning).
See more at Wikipedia.org...

This article gives a basic introduction to what mathematicians call "intuitive" or "naive" set theory; for a more detailed account see Naive set theory. For a rigorous modern axiomatic treatment of sets, see Axiomatic set theory. In mathematics, a set can be thought of as any collection of distinct objects considered as a whole. Although this appears to be a simple idea, sets are one of the most fundamental concepts in modern mathematics. The study of the structure of possible sets, set theory, is rich and ongoing. Having only been invented at the end of the 19th century, set theory is now a ubiquitous part of mathematics education, being introduced from primary school in many countries. Set theory can be viewed as the foundation upon which nearly all of mathematics can be derived.
See more at Wikipedia.org...