square of sum

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• Sum of squares — is a concept that permeates much of inferential statistics and descriptive statistics. More properly, it is the sum of the squared deviations . Mathematically, it is an unscaled, or unadjusted measure of dispersion (also called variability). When …   Wikipedia

• Square number — In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer; in other words, it is the product of some integer with itself. So, for example, 9 is a square number,… …   Wikipedia

• Square (algebra) — In algebra, the square of a number is that number multiplied by itself. To square a quantity is to multiply it by itself.Its notation is a superscripted 2 ; a number x squared is written as x ². Thus: If x is a positive real number, the value of… …   Wikipedia

• Sum (monnaie) — Pour les articles homonymes, voir Sum et Soum. Le Sum ou Soum (en ouzbek : Soʻm, ce qui veut dire pur ) est la monnaie de l Ouzbékistan. Son code ISO 4217 est UZS …   Wikipédia en Français

• Square root — Measured fall time of a small steel sphere falling from various heights. The data is in good agreement with the predicted fall time of , where h is the height and g is the acceleration of gravity. In mathematics, a square root of a number x is a… …   Wikipedia

• Square pyramidal number — In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. These numbers can be expressed in a formula as:sum {k=1}^nk^2={n(n + 1)(2n + 1) over 6}={2n^3 + 3n^2 + n over …   Wikipedia

• Square antiprism — In geometry, the square antiprism is the second in an infinite set of antiprisms formed by an even numbered sequence of triangle sides closed by two polygon caps.If all its faces are regular, it is a semiregular polyhedron.When eight points are… …   Wikipedia

• square —    A closed two dimensional shape (polygon) bounded by four straight line segments of equal length (equilateral) joined at four equal (right) angles. The formula with which to find its area: the length of one side squared (see below). The… …   Glossary of Art Terms

• Square-lattice Ising model — The two dimensional square lattice Ising model was solved by Lars Onsager in 1944 for the special case that the external field H = 0. The general case for H eq 0 has yet to be found.Consider the 2D Ising model on a square lattice Lambda with N… …   Wikipedia

• Sum of two squares — In mathematics, sums of two squares occur in a number of contexts:* The Pythagorean theorem says that the square on the hypotenuse of a right triangle is equal in area to the sum of the squares on the legs * Brahmagupta–Fibonacci identity says… …   Wikipedia

• Mystic square — The square array of the integers 1 through n2 that is generated when a method for constructing a 4 × 4 magic square is generalized was called a mystic square by Joel B. Wolowelsky and David Shakow in their article describing a method… …   Wikipedia