Equation 15 · Part 2 · Naive, Graph, and Agentic: A Systems Comparison of RAG Architectures
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
This is the one family among the five whose defining engineering trade-off is temporal rather than architectural: cost is shifted from query time to index time. Writing for the one-time cost of building the graph and its community summaries, and for the cost of answering a single query against the finished structure, the amortised cost of a query workload of size Q against one graph is
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the article section
- [4] From Local to Global: A Graph RAG Approach to Query-Focused Summarization ↗
- [5] GraphRAG: Get Started ↗
- [6] LazyGraphRAG: Setting a New Standard for Quality and Cost ↗
These citations provide research context; check each source for the exact claim it supports.