Exceptional Lie Group \(E_7\)
摘要
We define a C-vector space \({\mathfrak {P}}^C\) , called the Freudenthal C-vector space, by \(\displaystyle {\mathfrak {P}}^C = {\mathfrak {J}}^C \oplus {\mathfrak {J}}^C \oplus C \oplus C. \)