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Difference between revisions of "Relative metric"

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The restriction of a [[Metric|metric]] <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810201.png" /> to a subset <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810202.png" /> of a [[Metric space|metric space]] <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810203.png" />, i.e. the restriction of the mapping <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810204.png" /> of the square <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810205.png" /> to the square <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/r/r081/r081020/r0810206.png" />. This concept permits one to consider any subset of a metric space as a metric space.
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The restriction of a [[Metric|metric]] $\rho$ to a subset $A$ of a [[Metric space|metric space]] $X$, i.e. the restriction of the mapping $\rho$ of the square $X\times X$ to the square $A\times A\subset X\times X$. This concept permits one to consider any subset of a metric space as a metric space.

Latest revision as of 07:09, 21 April 2012

The restriction of a metric $\rho$ to a subset $A$ of a metric space $X$, i.e. the restriction of the mapping $\rho$ of the square $X\times X$ to the square $A\times A\subset X\times X$. This concept permits one to consider any subset of a metric space as a metric space.

How to Cite This Entry:
Relative metric. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Relative_metric&oldid=24944
This article was adapted from an original article by B.A. Pasynkov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article