We need a basis of consistent solutions.

As the other vector we choose 

The asymptotics for  are obtained by symmetry from those already computed.

One compute the coefficients of the monodromy matrix

to obtain a monodromy matrix of the form

where 


Depending on the domain on which the asymtptotics of the consistent basis 
are known, one can compute a general formula for the coefficients.

For example, one proves