Generalized power series
Expansions on branch cuts
In the lower halfplane
In the upper halfplane
Expansions at z==0
Expansions at z==i/2
Expansions at z==i/2
Expansions at z==z_{0}/;z_{0}!=+i/2+2i k
Expansions at z==i/2+2i k
Expansions at z==i/22i k
