Equation 13 · Part 3 · Retrieval Is an Evidence System, Not a Memory
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
Suppose retrieval succeeds. The relevant passage is in , correctly chunked, in the prompt. The system may still fail, for a reason that has nothing to do with retrieval quality.
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
- [11] Lost in the Middle: How Language Models Use Long Contexts ↗
- [12] Large Language Models Can Be Easily Distracted by Irrelevant Context ↗
- [18] Benchmarking Large Language Models in Retrieval-Augmented Generation ↗
These citations provide research context; check each source for the exact claim it supports.