# Set

(redirected from set the stage for)
Also found in: Dictionary, Thesaurus, Medical, Legal, Idioms.

or

## Seth

(both: sĕt or sāt), in Egyptian religion, god of evil. Set was a sun god of predynastic Egypt, but he gradually degenerated from being a beneficent deity into being a god of evil and darkness. In a widespread Egyptian myth he murdered his brother OsirisOsiris
, in Egyptian religion, legendary ruler of predynastic Egypt and god of the underworld. He was the son of the sky goddess Nut and the earth god Geb. The great benefactor of mankind, Osiris brought to the people knowledge of agriculture and civilization.
and was in turn defeated by Horus, the son of Osiris. The Greeks identified Set with Typhon.

## set,

in mathematics, collection of entities, called elements of the set, that may be real objects or conceptual entities. Set theory not only is involved in many areas of mathematics but has important applications in other fields as well, e.g., computer technology and atomic and nuclear physics.

### Definition of Sets

A set must be well defined; i.e., for any given object, it must be unambiguous whether or not the object is an element of the set. For example, if a set contains all the chairs in a designated room, then any chair can be determined either to be in or not in the set. If there were no chairs in the room, the set would be called the empty, or null, set, i.e., one containing no elements. A set is usually designated by a capital letter. If A is the set of even numbers between 1 and 9, then A={2, 4, 6, 8}. The braces, {}, are commonly used to enclose the listed elements of a set. The elements of a set may be described without actually being listed. If B is the set of real numbers that are solutions of the equation x2=9, then the set can be written as B={x:x2=9} or B={x|x2=9}, both of which are read: B is the set of all x such that x2=9; hence B is the set {3,−3}.

Membership in a set is indicated by the symbol ∈ and nonmembership by ∉; thus, xA means that element x is a member of the set A (read simply as "x is a member of A") and yA means y is not a member of A. The symbols ⊂ and ⊃ are used to indicate that one set A is contained within or contains another set B; AB means that A is contained within, or is a subset of, B; and AB means that A contains, or is a superset of, B.

### Operations on Sets

There are three basic set operations: intersection, union, and complementation. The intersection of two sets is the set containing the elements common to the two sets and is denoted by the symbol ∩. The union of two sets is the set containing all elements belonging to either one of the sets or to both, denoted by the symbol ∪. Thus, if C={1, 2, 3, 4} and D={3, 4, 5}, then CD={3, 4} and CD={1, 2, 3, 4, 5}. These two operations each obey the associative lawassociative law,
in mathematics, law holding that for a given operation combining three quantities, two at a time, the initial pairing is arbitrary; e.g., using the operation of addition, the numbers 2, 3, and 4 may be combined (2+3)+4=5+4=9 or 2+(3+4)=2+7=9.
and the commutative lawcommutative law,
in mathematics, law holding that for a given binary operation (combining two quantities) the order of the quantities is arbitrary; e.g., in addition, the numbers 2 and 5 can be combined as 2+5=7 or as 5+2=7.
, and together they obey the distributive lawdistributive law.
In mathematics, given any two operations, symbolized by * and +, the first operation, *, is distributive over the second, +, if a*(b+c)=(a*b)+(a*c) for all possible choices of a, b, and c.
.

In any discussion the set of all elements under consideration must be specified, and it is called the universal set. If the universal set is U={1, 2, 3, 4, 5} and A={1, 2, 3}, then the complement of A (written A′) is the set of all elements in the universal set that are not in A, or A′={4, 5}. The intersection of a set and its complement is the empty set (denoted by ∅), or AA′=∅; the union of a set and its complement is the universal set, or AA′=U. See also symbolic logicsymbolic logic
or mathematical logic,
formalized system of deductive logic, employing abstract symbols for the various aspects of natural language. Symbolic logic draws on the concepts and techniques of mathematics, notably set theory, and in turn has contributed to
.

## Set

a young plant raised for subsequent planting in a garden, park, or similar place. Sets of fruit crops are obtained in fruit nurseries; they are usually produced from grafted seedlings (stocks). Sets of berry crops (currant, gooseberry) are one-year-old nongrafted plants. The root suckers of raspberry plants are used as sets. In forestry, sets are young trees that have been raised from seeds or cuttings.

## Set

(also Seth), in ancient Egyptian religion and mythology, a god initially venerated in the city of Ombos and whose cult then apparently spread throughout Upper Egypt and the northwest part of the Nile Delta. Set was considered a god of the desert and of foreign countries. According to Egyptian mythology, he was the brother and murderer of Osiris and was subsequently defeated by Horus, the son of Osiris. He was depicted in the form of an unidentifiable animal.

## set

[set]
(astronomy)
Of a celestial body, to cross the visible western horizon while descending.
(chemistry)
The hardening or solidifying of a plastic or liquid substance.
(computer science)
A collection of record types.
(electronics)
The placement of a storage device in a prescribed state, for example, a binary storage cell in the high or 1 state.
(engineering)
A combination of units, assemblies, and parts connected or otherwise used together to perform an operational function, such as a radar set.
In plastics processing, the conversion of a liquid resin or adhesive into a solid state by curing or evaporation of solvent or suspending medium, or by gelling.
Saw teeth bent out of the plane of the saw body, resulting in a wide cut in the workpiece.
(geology)
A group of essentially conformable strata or cross-strata, separated from other sedimentary units by surfaces of erosion, nondeposition, or abrupt change in character.
(graphic arts)
The fixing or drying of a printing ink on a printed sheet, so that, though not completely dry, the sheet can be handled without smudging.
(materials)
The hardening or firmness displayed by some materials when left undisturbed.
Permanent deformation of a material, such as metal or plastic, when stressed beyond the elastic limit.
(mathematics)
A collection of objects which has the property that, given any thing, it can be determined whether or not the thing is in the collection.
(mechanics)
(mining engineering)
The establishment of a course.
(oceanography)
The direction toward which an oceanic current flows.

## set

1. The condition reached by a cement paste, mortar, or concrete when it has lost plasticity to an arbitrary degree; usually measured in terms of resistance to penetration or deformation; initial set refers to first stiffening, final set to attainment of significant rigidity.
2. The hydration and hardening of a gypsum plaster.
3. To convert a liquid resin or an adhesive to a hardened state by chemical or physical action such as condensation, polymerization, oxidation, vulcanization, gelation, hydration, or the evaporation of volatile constituents.
4.See saw set.
5. In plastering, to apply a finishing coat.
6. To drive a nail below the surface of the wood (with the use of a nail set).
7. The strain remaining after complete release of the load producing a deformation.
8. Collectively, the pieces of scenery that make up a theatrical scene.
9. To coat the back surface of a tile so that it will adhere to the surface to which it is applied.

## set

1. Maths logic
a. a collection of numbers, objects, etc., that is treated as an entity: {3, the moon} is the set the two members of which are the number 3 and the moon
b. (in some formulations) a class that can itself be a member of other classes
3. Tennis squash badminton one of the units of a match, in tennis one in which one player or pair of players must win at least six games
4.
a. the number of couples required for a formation dance
b. a series of figures that make up a formation dance
5.
a. a band's or performer's concert repertoire on a given occasion
b. a continuous performance

## SET

(security)
Secure Electronic Transaction.

(electronics)

(standard)

## set

(4)
A collection of objects, known as the elements of the set, specified in such a way that we can tell in principle whether or not a given object belongs to it. E.g. the set of all prime numbers, the set of zeros of the cosine function.

For each set there is a predicate (or property) which is true for (possessed by) exactly those objects which are elements of the set. The predicate may be defined by the set or vice versa. Order and repetition of elements within the set are irrelevant so, for example, 1, 2, 3 = 3, 2, 1 = 1, 3, 1, 2, 2.

Some common set of numbers are given the following names:

N = the natural numbers 0, 1, 2, ...

Z = the integers ..., -2, -1, 0, 1, 2, ...

Q = the rational numbers p/q where p, q are in Z and q /= 0.

R = the real numbers

C = the complex numbers.

The empty set is the set with no elements. The intersection of two sets X and Y is the set containing all the elements x such that x is in X and x is in Y. The union of two sets is the set containing all the elements x such that x is in X or x is in Y.

## Set

(1) An internal DOS/Windows command that sets environment variables, which are stored values used by the operating system and many applications. To display the current values, type:
`set`

SETTING A VALUE
The set command creates an environment variable and places a value into it. Blank spaces matter. The following examples create NEWVAR with a value of "a."
```set newvar=a   create newvar with "a"
set newvar= a  create newvar with " a"

set newvar=    delete newvar
```

(2) (SET) (Secure Electronic Transaction) A standard protocol from MasterCard and Visa for securing online credit card payments via the Internet. In this three-way transaction, the user, merchant and bank must use the SET protocols.

Credit card data and a digital certificate (for authentication) is stored in a plug-in to the user's Web browser. The order is received by a SET-enabled merchant server that passes encrypted payment information to the bank. Approval is electronically sent to the merchant.
References in periodicals archive ?
The mayor set the stage for the dispute when he sent the letter earlier in the day, saying that neither he, City Attorney Rocky Delgadillo nor Controller Laura Chick had been consulted.
But state officials say the 1995 decision helped to set the stage for this year's blackouts.
Greg Price, Director of Consulting Solutions for PKF Texas set the stage for Navision User's Group kick off event.
President Clinton must be removed from office to set the stage for cleaning up all public offices of unethical and immoral individuals.
The Union stated that Grupo Mexico's asset stripping and poor management of Asarco set the stage for the bankruptcy filing.
Police have stepped up maneuvers around the mansion seized by leftist rebels to set the stage for talks to free the 73 men held captive for more than five weeks, Peru's chief negotiator said Saturday.
Organizations such as Dow Jones, the National Institutes of Health and Teledyne rely on Netuitive to maximize the value of their performance management solutions, reduce costs - often by hundreds of thousands of dollars - and set the stage for advanced systems management initiatives.
Listening to tunes such as ``We've Got Tonight,'' ``Rock 'n' Roll Never Forgets'' and ``Travelin' Man'' segued into ``Beautiful Loser'' makes one realize that, like other great American artists, Seger has set the stage for the aspirations of younger songwriters.
The Company and its technology will help set the stage for significant improvements in spectrum efficiency and increased flexibility for service providers to meet the demands of enterprise, government and residential consumers.
Inforonics documents the results to set the stage for effective application management strategies.
Combined with the advances in the specification that now enable 800 Megabit per second bandwidth and 100-meter distances, these decisions set the stage for a new generation of PC and CE products with the premier audio-video standard.

Site: Follow: Share:
Open / Close