Bull. Korean Math. Soc. 2006; 43(3): 635-644
Printed September 1, 2006
Copyright © The Korean Mathematical Society.
Jang-Ho Chun and June-Won Park
Yeungnam University, Kyungil University
For a lower niltriangular matrix ring $A=NT_n(K)$ $(n \geq 3)$, we show that every derivation of $A$ is a sum of certain diagonal, trivial extension and strongly nilpotent derivation. Moreover, a strongly nilpotent derivation is a sum of an inner derivation and an $uaz$-derivation.
Keywords: derivations, diagonal derivations, strongly nilpotent deri-vations, inner derivations
MSC numbers: 16S32, 16D25
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