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[4] [9] Three of the next four presidents after Jefferson—Madison, James Monroe, and Andrew Jackson—served two terms, and each adhered to the two-term principle; [1] Martin Van Buren was the only president between Jackson and Abraham Lincoln to be nominated for a second term, though he lost the 1840 election and so served only one term. [9]
A 2019 amendment to the constitution states that the head of state can serve no more than two terms. [2] There was an understanding that the office is to rotate among the four paramount dynasties, of which the most recently elected belongs to the Tuimaleali'ifano lineage. [9] The termination of a head of state's term can occur in four ways ...
The notation a ≥ b or a ⩾ b or a ≧ b means that a is greater than or equal to b (or, equivalently, at least b, or not less than b). In the 17th and 18th centuries, personal notations or typewriting signs were used to signal inequalities. [2] For example, In 1670, John Wallis used a single horizontal bar above rather than
In mathematics, the pigeonhole principle states that if n items are put into m containers, with n > m, then at least one container must contain more than one item. [1] For example, of three gloves, at least two must be right-handed or at least two must be left-handed, because there are three objects but only two categories of handedness to put ...
Scitovsky paradox: Using the Kaldor–Hicks criterion, an allocation A may be more efficient than allocation B, while at the same time B is more efficient than A. Service recovery paradox: Successfully fixing a problem with a defective product may lead to higher consumer satisfaction than in the case where no problem occurred at all.
For example, in theories with no function symbols and a finite number of relations, it is possible to define equality in terms of the relations, by defining the two terms s and t to be equal if any relation is unchanged by changing s to t in any argument. Some theories allow other ad hoc definitions of equality:
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Example 2 For the whole numbers greater than two, being odd is necessary to being prime, since two is the only whole number that is both even and prime. Example 3 Consider thunder, the sound caused by lightning. One says that thunder is necessary for lightning, since lightning never occurs without thunder. Whenever there is lightning, there is ...