The monodromy matrix:

Two linearly independent solutions  to (1) form a consistent basis if
 their Wronskian is independent of ,
 these solutions are 1-periodic in  i.e. 

Consistent bases exist (for example,  and ).
The functions  are solutions of equation (1). 
Indeed, one has  and  so

Therefore,

 is the monodromy matrix associated to the consistent basis.
The monodromy matrix satisfies