A column-convex self-avoiding polygon which contains the bottom edge of its minimal bounding rectangle. The anisotropic perimeter and area generating function
 |
(1)
|
where 
is the number of polygons with 
horizonal bonds, 
vertical bonds, and area 
, has been computed exactly for the bar graph polygons (Bousquet-Mélou
1996, Bousquet-Mélou et al. 1999). The anisotropic area and perimeter
generating function 
and partial generating functions 
, connected by
 |
(2)
|
satisfy the self-reciprocity and inversion relations
 |
(3)
|
and
 |
(4)
|
(Bousquet-Mélou et al. 1999).
