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${{Q}_{p}}$ Composition Operator
The ${{Q}_{p}}$ spaces coincide with the Bloch space for 
$p\,>\,1$ and are subspaces of 
$\text{BMOA}$ for 
$0\,<\,p\,\le \,1$. We obtain lower and upper estimates for the essential norm of a composition operator from the Bloch space into ${{Q}_{p}}$, in particular from the Bloch space into $\text{BMOA}$.
