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Difference between revisions of "Unit representation"

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The one-dimensional representation of a group <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954901.png" /> that maps each element of <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954902.png" /> to the number 1. More generally, the unit representation of a group <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954903.png" /> in a vector space <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954904.png" /> is the representation of <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954905.png" /> that maps each element of <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954906.png" /> to the identity operator in <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/u/u095/u095490/u0954907.png" />. The unit representation is sometimes also called the trivial representation.
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The one-dimensional representation of a group $G$ that maps each element of $G$ to the number 1. More generally, the unit representation of a group $G$ in a vector space $E$ is the representation of $G$ that maps each element of $G$ to the identity operator in $E$. The unit representation is sometimes also called the trivial representation.

Latest revision as of 15:46, 1 May 2014

The one-dimensional representation of a group $G$ that maps each element of $G$ to the number 1. More generally, the unit representation of a group $G$ in a vector space $E$ is the representation of $G$ that maps each element of $G$ to the identity operator in $E$. The unit representation is sometimes also called the trivial representation.

How to Cite This Entry:
Unit representation. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Unit_representation&oldid=32077
This article was adapted from an original article by A.I. Shtern (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article