信徒
发表于 2025-4-1 01:56:46
http://reply.papertrans.cn/17/1670/166957/166957_61.png
Hearten
发表于 2025-4-1 06:07:32
Nilpotent (Classical) Normal Form,degree of sophistication. One can consider this part of normal form theory as belonging to invariant theory. Of course, this is also true for the semisimple case, but there we can usually solve the problem without any knowledge of invariant theory beyond the obvious. A good source for the background