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BUILT-IN MATHEMATICA SYMBOL
Union 
Union[list1, list2, ...]
gives a sorted list of all the distinct elements that appear in any of the 
.
Union[list]
gives a sorted version of a list, in which all duplicated elements have been dropped.
Details and Options
- If the
are considered as sets, Union gives their union. - Union[list1, list2, ...] can be input in StandardForm and InputForm as
. The character 
can be entered as EscunEsc or \[Union]. - The
must have the same head, but it need not be List. - Union[list1, ..., SameTest->test] applies test to each pair of elements in the
to determine whether they should be considered the same.
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