E=extAlgebra(n,L)
The Extalgebra of the Lie algebra $L$ is $Ext_{UL}(F,F)$, where $F$ is the field of $L$ and $UL$ is the enveloping algebra of $L$. It is computed using the minimal model of $L$, see ExtAlgebra. If $R$ is a quadratic (skew)commutative Koszul algebra, and L is the value of koszulDual($R$) then extAlgebra(n,L) represents the ring $R$ up to degree $n$. A basis for $Ext_{UL}(F,F)$ as a vector space is represented by generators(ExtAlgebra). The symbol SPACE is used as multiplication of elements in the Extalgebra and for multiplication by scalars.











The object extAlgebra is a method function.