UnDeclareCommutator
UnDeclareCommutator[a, b]
undeclares the value assigned to the commutator of a
and b
.
See also
Overview, Commutator, CommutatorExplicit, DeclareNonCommutative, DotSimplify.
Examples
Commutator[QuantumField[FCPartialD[LorentzIndex[xxx_]], A], QuantumField[A]] = 0;
QuantumField[A] . QuantumField[A] . LeftPartialD[\[Nu]] . QuantumField[A] . QuantumField[A] . LeftPartialD[\[Nu]]
ExpandPartialD[%]
A.A.∂ν.A.A.∂ν
6A.A.((∂νA)).((∂νA))+A.(∂ν∂νA).A.A+(∂ν∂νA).A.A.A
UnDeclareCommutator[QuantumField[FCPartialD[LorentzIndex[xxx_]], A], QuantumField[A]];
QuantumField[A] . QuantumField[A] . LeftPartialD[\[Nu]] . QuantumField[A] . QuantumField[A] . LeftPartialD[\[Nu]]
ExpandPartialD[%]
A.A.∂ν.A.A.∂ν
A.((∂νA)).A.((∂νA))+A.((∂νA)).((∂νA)).A+((∂νA)).A.A.((∂νA))+((∂νA)).A.((∂νA)).A+2((∂νA)).((∂νA)).A.A+A.(∂ν∂νA).A.A+(∂ν∂νA).A.A.A