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In mathematics, a set is a collection of distinct objects, considered as an object in its own right. For example, the numbers 2, 4, and 6 are distinct objects when considered separately, but when they are considered collectively they form a single set of size three, written {2,4,6}. The concept of a set is one of the most fundamental in mathematics. Developed at the end of the 19th century, set theory is now a ubiquitous part of mathematics, and can be used as a foundation from which nearly all of mathematics can be derived. In mathematics education, elementary topics from set theory such as Venn diagrams are taught at a young age, while more advanced concepts are taught as part of a university degree. The German word Menge, rendered as "set" in English, was coined by Bernard Bolzano in his work The Paradoxes of the Infinite.
Jigsaw puzzle - colorful puzzle jigsaw
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Jigsaw puzzle

Added year ago by andi

27

Computer set - A set of computer game for children
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Computer set

Added year ago by Adam

11

Mroczny Romans - Mroczny romans z białą damą
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Mroczny Romans

Added over a year ago by Eleonora

16

dottpeluche - cd fgas ghj klpo  uytr wqlk  nmn mn  mn  vbn mcxz asdfg hjklp oiuytr ew qwe  ee ee
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dottpeluche

Added over a year ago by sandro

85

Trefl Puzzle - Samoloty Dusty i jego dróżyna
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Trefl Puzzle

Added over a year ago by Julka

20