Capped Vertices

Gluon caps find their greatest use when appended to -generated vertices. One does not have a choice of which gluon type is produced when gluon is employed. Capped vertices may be seen in the lower left of the cover illustration. In this case gluons of types CURLY and FLIPPEDCURLY are capped. The syntax is

verbatim13#

Where, once again, 1 is the gluon line to be capped. vertexcaps caps all lines which can be capped. Examples would be

verbatim14#

In the latter case no caps would be drawn since all three lines are of a CENTRAL variety. vertexcap may be used in conjunction with vertexlink and stemvertex.

Exercise: Produce

#picture17#

In the above the circle is of diameter #math16#1000#tex2html_wrap_inline69# and the `stems' attached to it of length 1500. Try to work from the upper left to the lower right.