NOSPUR _ _ _ _ _ _ _ _ _ _ _ _ declaration

The nospur declaration prevents the trace calculation over the given line identifiers in high-energy physics calculations.

syntax:

nospur<line-id>{,<line-id>}*

<line-id> is a scalar identifier that will be used as a line identifier.

examples:

vector a1,b1,c1; 

g(line1,a1,b1)*g(line2,b1,c1); 

  A1.B1*B1.C1 


nospur line2; 

g(line1,a1,b1)*g(line2,b1,c1); 

  A1.B1*G(LINE2,B1,C1)

Nospur declarations can be removed by making the declaration spur.