Bulletin of the
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Bull. Korean Math. Soc. 2015; 52(2): 351-361

Printed March 31, 2015

https://doi.org/10.4134/BKMS.2015.52.2.351

Copyright © The Korean Mathematical Society.

Lie ideals in tridiagonal algebra Alg${\mathcal L}_\infty$

Joo Ho Kang

Daegu University

Abstract

We give examples of Lie ideals in a tridiagonal algebra Alg${\mathcal L}_\infty$ and study some properties of Lie ideals in Alg${\mathcal L}_\infty$. We also investigate relationships between Lie ideals in Alg${\mathcal L}_\infty$. Let $k$ be a fixed natural number. Let $\mathcal A$ be a linear manifold in Alg${\mathcal L}_\infty$ such that $T_{(2k-1, 2k)} =0$ for all $T \in {\mathcal A}$. Then $\mathcal A$ is a Lie ideal if and only if $T_{(2k-1, 2k-1)} = T_{(2k, 2k)}$ for all $T \in {\mathcal A}$.

Keywords: linear manifold, Lie ideal, tridiagonal algebras

MSC numbers: 47L35

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