restriction

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(rĭ-strĭk'shən) pronunciation
n.
    1. The act of restricting.
    2. The state of being restricted.
  1. Something that restricts; a regulation or limitation.



In general: any limitation.


Real estate: limitation placed upon the use of property, for example, as contained in the deed or other written instrument in the chain of title or in local ordinances pertaining to land use.

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A limitation placed upon the use of property, contained in the deed or other written instrument in the chain of title or in local ordinances pertaining to land use.
See encumbrance.


Examples: The ownership of property is subject to several restrictions. A deed covenant may restrict development alternatives, as may a local zoning ordinance .
easements may restrict use of parts of the property.
liens may restrict sales.
building codes may restrict construction practices.

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Roget's Thesaurus:

restriction

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n

Definition: limit
Antonyms: enlargement, expansion, freedom, release

A bug or design error that limits a program's capabilities, and which is sufficiently egregious that nobody can quite work up enough nerve to describe it as a feature. Often used (esp. by marketroid types) to make it sound as though some crippling bogosity had been intended by the designers all along, or was forced upon them by arcane technical constraints of a nature no mere user could possibly comprehend (these claims are almost invariably false).

Old-time hacker Joseph M. Newcomer advises that whenever choosing a quantifiable but arbitrary restriction, you should make it either a power of 2 or a power of 2 minus 1. If you impose a limit of 107 items in a list, everyone will know it is a random number — on the other hand, a limit of 15 or 16 suggests some deep reason (involving 0- or 1-based indexing in binary) and you will get less flamage for it. Limits which are round numbers in base 10 are always especially suspect.


On land, an encumbrance limiting its use; usually imposed for community or mutual protection.


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Any form of restriction in a dream often mirrors some frustration in the dreamer's personal or business life. The dreamer may be imposing restrictions on himself or herself as well as on others.


Wikipedia on Answers.com:

Restriction (mathematics)

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In mathematics, the notion of restriction of a function is defined as follows:

If f : EF is a function from E to F, and A is a subset of E, then the restriction of f to A is the (partial) function

 {f|}_A : A \to F having the graph G({f|}_A) = \{ (x,y)\in G(f) \mid x\in A \}.

(In rough words, it is "the same function", but only defined on A\cap \mathrm{dom} \, f.)

More generally, the restriction (or domain restriction or left-restriction) AR of a binary relation R between E and F may be defined as a relation having domain A, codomain F and graph G(AR) = {(x, y) ∈ G(R) | x ∈ A}. Similarly, one can define a right-restriction or range restriction RB. (Indeed, one could define a restriction to a subset of E x F, and the same applies to n-ary relations. These cases do not fit into the scheme of sheaves.)

The domain anti-restriction (or domain subtraction) of a function or binary relation R (with domain E and codomain F) by a set A may be defined as (E \ A) ◁ R; it removes all elements of A from the domain E. It is sometimes denoted AR. Similarly, the range anti-restriction (or range subtraction) of a function or binary relation R by a set B is defined as R ▷ (F \ B); it removes all elements of B from the codomain F. It is sometimes denoted RB.

Examples

  1. The restriction of the non-injective function  f: \mathbb R\to\mathbb R; x\mapsto x^2 to  \mathbb R_+=[0,\infty) is the injection  f: \mathbb R_+\to\mathbb R; x\mapsto x^2.
  2. The inclusion map of a set A into a superset E of A is the restriction of the identity function on E to A.

See also


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