Improved treatment of "mixed" objects where one piece is D, D-4 or 4
dimensions and the other one is in a different dimension. As usual,
such combinations are resolved according to the BMHV algebra, but this
is now done also on the level of Pair for all cases, while before this worked
only for (D,4) cases.
Improved the TraditionalForm representation of the metric tensor
in 4, D and D-4 dimensions.
Improved the TraditionalForm representation of momentum vectors
in 4, D and D-4 dimensions.
From now on all 4-dimensional quantities will be displayed with a
bar on top of the symbol. The D-dimensional quantities will not have such
a bar. This change allows to easily distinguish between 4- and
D-dimensional objects without deactivating the
TraditionalForm representation. This was not possible before.
Introduced SPE, a FeynCalcExternal shortcut for the D-4
dimensional scalar product.
Introduced MTE, a FeynCalcExternal shortcut for the D-4
dimensional metric tensor.
Introduced FVE, a FeynCalcExternal shortcut for the D-4
dimensional vector
Introduced GAE, a FeynCalcExternal shortcut for the D-4
dimensional Dirac matrix
Introduced GSE, a FeynCalcExternal shortcut for the D-4
dimensional Dirac slash.
Small fix for the handling of Dirac matrices with explicit Lorentz indices.
Improved the TraditionalForm representation of Dirac matrices and slashes
in 4, D and D-4 dimensions.
Improved the TraditionalForm representation in different dimensions
for metric tensors, vectors, Dirac matrices, Dirac slashes and scalar
products; Fixed problems with $LorentzIndices, $Covariant and $PairBrackets;
Lots of related refactoring and optimizations.