I have a topological space X and two disjoint, closed subspaces Y and Z of X. I believe that in this situation, for any abelian sheaf F on X and any p∈N, there is a natural isomorphism
between local cohomology groups. I can obtain this by taking an injective resolution 0→F→I∙ of F, and constructing by hand a split exact sequence of complexes of sheaves
and then passing to cohomology. I am certain that this is completely standard and well known; could someone please point me to a (preferably modern) reference for this result?