With activated notation
SpAssoc[P], with
P being LVector, is denoted by
P
:
When argument of
SpAssoc is not LVector notation is not changed:
With activated notation
SpAssoc[P, Q], with
P and
Q being LVectors, is denoted by
PQ:
When arguments of
SpAssoc are not LVectors notation is not changed:
SpAssoc[P], with
P being LVector, is interpreted as massless Spinor:
If argument of
SpAssoc is not LVector, then
SpAssoc is not treated as Spinor:
SpAssoc[P, Q], with
P and
Q being LVectors, is interpreted as massless Spinor:
If arguments of
SpAssoc are not LVectors, then
SpAssoc is not treated as Spinor:
Default numerical components for
SpAssoc[P], with
P being LVector with declared numerical components, can be declared by using
DeclareSpinorMomentum with one argument (this will also automatically set default numerical values for
SpRef[P] if it was not set earlier):
Numerical values obtained this way are equal to following combination of numerical values of
P and
SpRef[P]:
Default numerical components for
SpAssoc[P, q], with
P being LVector and
q being massless Spinor both with declared numerical components, can be declared by using
DeclareSpinorMomentum with one argument:
Numerical values obtained this way are equal to following combination of numerical values of
P and
q:
Default numerical components for
SpAssoc[P, Q], with
P and
Q being LVectors with declared numerical components, can be declared by using
DeclareSpinorMomentum with one argument:
Numerical values obtained this way are equal to following combination of numerical values of
P ,
Q and
QP:
When
DeclareSpinorMomentum, with
SpAssoc[P, Q] as only argument, is called when
P or
Q does not have declared numerical components declaration fails and a warning message is printed:
where qP denotes default reference vector SpRef[P].
.
and 
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EXAMPLES
Properties & Relations 
Notation 
