UnDeclareNonCommutative[a, b, ...] undeclares a,b, ... to be noncommutative, i.e., DataType[a,b, ..., NonCommutative] is set to False.
See also: DataType, DeclareNonCommutative.
As a side-effect of DeclareNonCommutative x is declared to be of DataType NonCommutative.
DataType[x,NonCommutative]
The inverse operation is UnDeclareNonCommutative.
The FeynCalc Book | Uncontract | Write2 |