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Equation 22 · Part 1 · Naive, Graph, and Agentic: A Systems Comparison of RAG Architectures

Symbol c_marginal

cmarginalc_{\text{marginal}}
cmarginalc_{\text{marginal}}

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

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cmc_marginal 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

…naive or hybrid architectures are cheaper by a wide margin, because they pay nothing until a query arrives. When Q is large against a stable corpus, the fixed term is driven down toward zero and the comparison turns on cmarginalc_{\text{marginal}} against the per-query cost of the alternatives. The direction of that comparison depends on the question being asked, not only on volume: Edge and colleagues report that GraphRAG produces substantially more comprehensive and diverse answers than a conventional RAG baseline…

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