FEYN CALC SYMBOL

Pair


is the head of a special pairing used in the internal representation: x and y may have heads LorentzIndex or Momentum. If both x and y have head LorentzIndex, the metric tensor is understood. If x and y have head Momentum, a scalar product is meant. If one of x and y has head LorentzIndex and the other Momentum, a Lorentz vector p^mu is understood.

ExamplesExamplesopen allclose all

Basic Examples  (1)Basic Examples  (1)

This represents a four-dimensional metric tensor.
In[1]:=
Click for copyable input
Out[1]=
This is a D-dimensional metric tensor.
In[2]:=
Click for copyable input
Out[2]=
In[3]:=
Click for copyable input
Out[3]=
In[4]:=
Click for copyable input
Out[4]=
In[5]:=
Click for copyable input
Out[5]=
In[6]:=
Click for copyable input
Out[6]=
In[7]:=
Click for copyable input
Out[7]=
In[8]:=
Click for copyable input
Out[8]=
In[9]:=
Click for copyable input
Out[9]=
In[10]:=
Click for copyable input
Out[10]=
In[11]:=
Click for copyable input
Out[11]=