next up previous contents
Next: fwuvy_apply Up: Advance Options Previous: bv_to_loop   Contents

bvex_rule

The default is to demand that all the diagrams, in which other external particles directly connected to bound-state-vertex, are droped in Feynman diagram generation. The option can be set to
     bvex_rule:='no;
all the droped diagrams by the default demand of this option will be keeped.

wang jian xiong 2003-01-10