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The union of two sets A and B is the set of elements which are in A, in B, or in both A and B. [2] In set-builder notation , [3] For example, if A = {1, 3, 5, 7} and B = {1, 2, 4, 6, 7} then A ∪ B = {1, 2, 3, 4, 5, 6, 7}. A more elaborate example (involving two infinite sets) is: A = { x is an even integer larger than 1}
A disjoint union of a family of pairwise disjoint sets is their union . In category theory, the disjoint union is the coproduct of the category of sets, and thus defined up to a bijection. In this context, the notation is often used. The disjoint union of two sets and is written with infix notation as . Some authors use the alternative notation ...
The disjoint union is also called the graph sum, and may be represented either by a plus sign or a circled plus sign: If and are two graphs, then + or denotes their disjoint union. Related graph classes
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fullwidth plus sign u+ff1c ＜ fullwidth less-than sign u+ff1d ＝ fullwidth equals sign u+ff1e ＞ fullwidth greater-than sign u+ff3c \ fullwidth reverse solidus u+ff3e ^ fullwidth circumflex accent u+ff5c ｜ fullwidth vertical line u+ff5e ～ fullwidth tilde u+ffe2 ￢ fullwidth not sign u+ffe9 ￩ halfwidth leftwards arrow u+ffea ...
Mathematical Operators is a Unicode block containing characters for mathematical, logical, and set notation. Notably absent are the plus sign (+), greater than sign (>) and less than sign (<), due to them already appearing in the Basic Latin Unicode block, and the plus-or-minus sign (±), multiplication sign (×) and obelus (÷), due to them ...
Card check, also called majority sign-up, is a method for employees to organize into a labor union in which a majority of employees in a bargaining unit sign authorization forms, or "cards", stating they wish to be represented by the union.
integral sign. : colon (for division ) 1684 (deriving from use of colon to denote fractions, dating back to 1633) ·. middle dot (for multiplication ) 1698 (perhaps deriving from a much earlier use of middle dot to separate juxtaposed numbers) ⁄. division slash (a.k.a. solidus )
Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors. Account Management ·...
E pluribus unum included in the Great Seal of the United States, being one of the nation's mottos at the time of the seal's creation. E pluribus unum (/ iː ˈ p l ɜːr ɪ b ə s ˈ uː n ə m / ee PLUR-ib-əs OO-nəm, Classical Latin: [eː ˈpluːrɪbʊs ˈuːnʊ̃], Latin pronunciation: [e ˈpluribus ˈunum]) – Latin for "Out of many, one" (also translated as "One out of many" or "One ...