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For example, the union of three sets A, B, and C contains all elements of A, all elements of B, and all elements of C, and nothing else. Thus, x is an element of A ∪ B ∪ C if and only if x is in at least one of A, B, and C. A finite union is the union of a finite number of sets; the phrase does not imply that the union set is a finite set ...
The Union symbol (hieroglyph) is Gardiner sign listed no. F36, part of the series for parts of mammals. As a "union symbol", (a right and left half), it contains a vertical invisible 'centerline'. As a "union symbol", (a right and left half), it contains a vertical invisible 'centerline'.
At the time of creation, the hammer and sickle stood for worker-peasant alliance, with the hammer a traditional symbol of the industrial proletariat (who dominated the proletariat of Russia) and the sickle a traditional symbol for the peasantry, but the meaning has since broadened to a globally recognizable symbol for Marxism, communist parties ...
In category theory the disjoint union is defined as a coproduct in the category of sets. As such, the disjoint union is defined up to an isomorphism, and the above definition is just one realization of the coproduct, among others. When the sets are pairwise disjoint, the usual union is another realization of the coproduct.
(the symbol may also indicate the domain and codomain of a function; see table of mathematical symbols). ⊃ {\displaystyle \supset } may mean the same as ⇒ {\displaystyle \Rightarrow } (the symbol may also mean superset ).
The flag of the Soviet Union consisted of a plain red flag with a gold hammer crossed with a gold sickle placed beneath a gold-bordered red star. This symbol is in the upper left canton of the red flag. The colour red honours the red flag of the Paris Commune of 1871; the red star and the hammer and sickle are symbols of communism and socialism.
The raised fist, or the clenched fist, is a long-standing image of mixed meaning, often a symbol of solidarity, especially with a political movement. It is a common symbol representing a wide range of political ideologies, most notably socialism , communism , anarchism , and trade unionism , and can also be used as a salute expressing unity ...
Henosis (Ancient Greek: ἕνωσις) is the classical Greek word for mystical "oneness", "union" or "unity".In Neoplatonism, henosis is unification with what is fundamental in reality: the One (Τὸ Ἕν), the Source, or Monad. [1]