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Let $D$ an ordinary differential equation (let's assume $D$ only has regular singularities). Suppose $D$ = $D_0$$\partial$, where $\partial$ is $q\frac{d}{dq}$ My question is: Does there exist any relation between the monodromy of $D$ and that of $D_0$? If so, Is it sufficient to know the monodromy of $D_0$ in order to know the monodromy of $D$?

Thanks in advance for your cooperation

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