- #1
ghotra
- 53
- 0
I don't have pstricks...so I am going to use words.
[tex]
\text{contraction}\{ \overline{\psi}(x_1) \psi(x_1) \}
[/tex]
My question: Propogators are usually dealing with different points...but what is the contraction of two quantities evaluated at the same point.
Thanks.
[tex]
\text{contraction}\{ \overline{\psi}(x_1) \psi(x_1) \}
[/tex]
My question: Propogators are usually dealing with different points...but what is the contraction of two quantities evaluated at the same point.
Thanks.