Abstract
Given associative unital algebras and and a complex of bi\-modules, we give necessary and sufficient conditions for the total derived functors, $\Rh_A(T^\bullet,?):\D(A)\longrightarrow\D(B)$ and $?\Lt_BT^\bullet:\D(B)\longrightarrow\D(A)$, to be fully faithful. We also give criteria for these functors to be one of the fully faithful functors appearing in a recollement of derived categories. In the case when is just a bimodule, we connect the results with (infinite dimensional) tilting theory and show that some open question on the fully faithfulness of $\Rh_A(T,?)$ is related to the classical Wakamatsu tilting problem.
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