Equation 4 · Part 1 · From n-Grams to Reasoning Models: A Technical History of the Language Model
Symbol i
What this part means
i 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
i 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 i→Article meaning
The passage around this formula
Bahdanau, Cho and Bengio proposed letting the decoder search the source for the parts relevant to each output word, rather than reading from a single compressed vector [ 9 ] . The decoder computes, at each output step i , a context vector as a weighted sum of all encoder states:
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
These citations provide research context; check each source for the exact claim it supports.