Hello--

In a paper that I am reading, I am given a 2D filter kernel described in 
Z-transform format as

C(Z_t, Z_x) = B(1/Z_t) - (Z_x)( B(Z_t) )

where B(Z_t) is an expression of the Z-transform in terms of the time. 
The filter kernel described above is to be convolved with a 2D matrix, 
with coordinates in terms of (x, t), where x is position, and t is time.

How would I express this filter in Matlab and perform the convolution 
with the 2D kernel?

Nicholas