TR[exp]
calculates the Dirac trace of exp
. Depending on the setting of the option SUNTrace
also a trace over objects is performed.
TR[list]
finds the trace of the matrix or tensor list.
TR[list, f]
finds a generalized trace, combining terms with f instead of Plus
.
TR[list, f, n]
goes down to level n
in list
.
TR[expression]
calculates the DiracTrace
, i.e., TR[expression]
if any of DiracGamma
, GA
, GAD
, GS
or GSD
is present in expression.
Overview, DiracSimplify, DiracTrace, FermionSpinSum, SUNTrace.
[\[Mu], \[Nu]]
GA
TR[%]
TR[(GSD[p] + m) . GAD[\[Mu]] . (GSD[q] - m) . GAD[\[Nu]]]
TR[GA[\[Mu], \[Nu], \[Rho], \[Sigma], 5]]
TR[GS[p, q, r, s]]
TR[(GS[p] + m) . GA[\[Mu]] . (GS[q] + m) . GA[\[Mu]], Factoring -> True]
TR[GA[\[Alpha], \[Beta]], FCE -> True]
[\[Mu], \[Nu]] SUNT[b] . SUNT[c] SUNDelta[c, b]
GA
TR[%, SUNTrace -> False, SUNNToCACF -> True]
TR[%%, SUNTrace -> True, SUNNToCACF -> True]
TR[1, SUNTrace -> False, SUNNToCACF -> True]
TR[1, SUNTrace -> True, SUNNToCACF -> True]