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Equation 9 · Part 1 · Naive, Graph, and Agentic: A Systems Comparison of RAG Architectures

Symbol θ

θ\theta
θ\theta

What this part means

θ is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

θ is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

with retriever parameters η\eta and generator parameters θ\theta [ 1 ] . One retrieval call, one generation pass, and the entire system’s dependence on the corpus runs through that single set Zk(x)\mathcal{Z}_k(x) .

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Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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Sources cited in the surrounding passage

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