Surprising properties of centralisers in classical Lie algebras
Surprising properties of centralisers in classical Lie algebras
Let ๐ค be a classical Lie algebra, i.e., either ๐ค๐ฉ n , ๐ฐ๐ญ n , or ๐ฐ๐ฌ n and let e be a nilpotent element of ๐ค. We study various properties of the centralisers ๐ค e . The first four sections deal with rather elementary questions, like the centre of โฆ