Résumé:
In this master thesis, we study the growth properties of solutions of linear
differential equations of the form
( ) ( ) ( ) ( ) 1
1 0 ... 0, k k
k f A zf A zf − + ++ = −
( ) ( ) are analytic functions of [ p q, ]-order in an annulus of the 0 1 ,..., where Az A z k−
complex plane. We generalize some results obtained on the usual order and the
iterated p-order.