Equation 18 · Part 1 · Measuring What a RAG System Retrieves, Not Just What It Answers
Symbol k
What this part means
k 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
k is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol k→Article meaning
The passage around this formula
The measurement structure explains the divergence directly. Let R be the event that the retriever’s top- k results contain sufficient evidence to answer the query, and let “correct” mean the generated answer is judged faithful and relevant. Total correctness decomposes as
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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 article section
- [8] Benchmarking Large Language Models in Retrieval-Augmented Generation ↗
- [9] CRAG: Comprehensive RAG Benchmark ↗
These citations provide research context; check each source for the exact claim it supports.