12.Using the notion of coefficient matrix and maximal element.We prove that the Lie algebra is semi-simple and it has no abelian two dimensional subalgebra.
利用系数矩阵和极大项,证明了这类李代数是半单李代数且没有维交换子代数。
13.It seemed obvious now that his plan of the previous day—that of covering himself with a shallow layer of anonymity, becoming a turnspit or a scrubber at some rural hostel—was an impossible notion.