cut fraction
81publishing, history of — Introduction an account of the selection, preparation, and marketing of printed matter from its origins in ancient times to the present. The activity has grown from small beginnings into a vast and complex industry responsible for the… …
82Unique games conjecture — The Unique Games Conjecture (UGC) is a conjecture in computational complexity theory made by Subhash Khot in 2002.A unique game is a special case of a two prover, one round (2P1R) game. A two player, one round game has two players (also known as… …
83Liu Hui's π algorithm — is a mathematical algorithm invented by Liu Hui (fl. 3rd century), a mathematician of Wei Kingdom. Before his time, the ratio of the circumference of a circle to diameter was often taken experimentally as 3 in China, while Zhang Heng (78… …
84chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
85Molality — In chemistry, the molality, b (or m), of a solvent/solute combination is defined as the amount of solute, nsolute, divided by the mass of the solvent, msolvent (not the mass of the solution)[1]: If a mixture contains more than one solute or… …
86Quadratic irrational — In mathematics, a quadratic irrational, also known as a quadratic irrationality or quadratic surd, is an irrational number that is the solution to some quadratic equation with rational coefficients. Since fractions can be cleared from a quadratic …
87DNA — For a non technical introduction to the topic, see Introduction to genetics. For other uses, see DNA (disambiguation). The structure of the DNA double helix. The atoms in the structure are colour coded by element and the detailed structure of two …
88Addition — is the mathematical process of putting things together. The plus sign + means that two numbers are added together. For example, in the picture on the right, there are 3 + 2 apples meaning three apples and two other apples which is the same as… …
89History of the British Army — The history of the British Army spans over three and a half centuries and numerous European wars, colonial wars and world wars. From the early 19th century until 1914, the United Kingdom was the greatest economic and Imperial Power in the world,… …
90Suite de Farey — Pour les articles homonymes, voir Farey. En mathématiques, la suite de Farey d ordre n est la suite des fractions irréductibles entre 0 et 1 dont le dénominateur est inférieur ou égal à n et en ordre croissant. Chaque suite de Farey commence avec …
