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Let $M_I(\lambda)$ be the generalized Verma module with highest weight $\lambda$, $L(\lambda)$ be the simple highest weight module with highest weight $\lambda$.

Suppose $\mu\le \lambda\le \nu$, does this implies $\text{Ext}_{\mathcal{O}^\mathfrak{p}}(M_I(\mu),L(\lambda))$ is a subspace of $\text{Ext}_{\mathcal{O}^\mathfrak{p}}(M_I(\mu),L(\nu))$?

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