SUNTraceEvaluate is an option for SUNTrace,
SUNSimplify and some other functions. If set to
False, color traces remain unevaluated.
Automatic implies evaluation of traces with 2 or 3 color
matrices. Setting this option to True will force every
trace to be evaluated. For more details, see the documentation for
SUNTrace and SUNSimplify.
Overview, SUNSimplify, SUNTrace