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inequality
Columbia Encyclopedia entry: inequality
Inequality, in mathematics, statement that a mathematical expression is less than or greater than some other expression; an inequality is not as specific as an equation, but it does contain information about the expressions involved. The symbols < (less than), > (greater than), ≤ (less than or equal to), and ≥ (greater than or equal to) are used in place of the equals sign in expressions of inequalities. As in the case of equations, inequalities can be transformed in various ways. The direction of the inequality remains unchanged if some number is added to both sides or subtracted from both sides or if both sides are multiplied or divided by some positive number; e.g., subtracting 10 from both sides of the inequality x < 8 gives x - 10 < -2, and multiplying the inequality by 2 gives 2x < 16. Multiplication or division by a negative number reverses the sign of the inequality; e.g., if -2x < 8, then dividing both sides by -2 results in the inequality x > -4.
Wikipedia search results for: Inequality
From Wikipedia, the free encyclopedia
In mathematics, an inequality is a statement about the relative size or order of two objects, or about whether they are the same or not.
The notation a...more »
Columbia Encyclopedia search results: inequality
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  • Hipparchus, Greek astronomer

    Hipparchus, fl. 2d cent. B.C., Greek astronomer, b. Nicaea, Bithynia. He is the first systematic astronomer of whom there are records. He made his observations chiefly on the island of Rhodes....

  • Ayub Khan, Muhammad

    Ayub Khan, Muhammad, 1907–74, military leader and president (1958–69) of Pakistan. He was commissioned in the British Indian army in 1928 and saw active service as a battalion commander in Wor...

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