In the context of sheaf theory and derived categories in algebraic geometry or topology, the term "direct image with compact support" typically refers to the operation that takes a sheaf defined on a space and produces a new sheaf on another space, while restricting to a compact subset. More concretely, let's break this down: 1. **Sheaf**: A sheaf is a tool for systematically tracking local data attached to the open sets of a topological space.
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