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Difference between revisions of "Invariant subspace"

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''admissible subspace, of a [[Vector space|vector space]] <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523201.png" /> with respect to a given set <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523202.png" /> of linear mappings of <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523203.png" /> into itself''
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''admissible subspace, of a [[Vector space|vector space]] $V$ with respect to a given set $M$ of linear mappings of $V$ into itself''
  
A subspace <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523204.png" /> such that <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523205.png" /> for all <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523206.png" />, <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523207.png" />. It is also called an <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i0523209.png" />-invariant or <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/i/i052/i052320/i05232011.png" />-admissible subspace.
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A subspace $U$ such that $gu\in U$ for all $u\in U$, $g\in M$. It is also called an $M$-invariant or $M$-admissible subspace.
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[[Category:Linear and multilinear algebra; matrix theory]]

Latest revision as of 22:26, 14 November 2014

admissible subspace, of a vector space $V$ with respect to a given set $M$ of linear mappings of $V$ into itself

A subspace $U$ such that $gu\in U$ for all $u\in U$, $g\in M$. It is also called an $M$-invariant or $M$-admissible subspace.

How to Cite This Entry:
Invariant subspace. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Invariant_subspace&oldid=12241
This article was adapted from an original article by Yu.I. Merzlyakov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article