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Equation 7 · Part 1 · How Training Data and Synthetic Data Actually Work

Symbol n

n+1n+1
nn

What this part means

n+1 means one index position after n. In the article, use the nearby sentence to see what each position counts.

Its job in the formula

n+1 means one index position after n. In the article, use the nearby sentence to see what each position counts.

The passage around this formula

…own prior outputs across many generations [ 4 ] . Model collapse, as demonstrated in the Shumailov paper, is specifically about the recursive case: generation n+1 trained substantially on the sampled output of generation n , repeated across many generations, with the real data anchor diluted or absent [ 1 ] . Curated, teacher-generated synthetic data used once as a supplement to real data is a different mechanism from an uncurated corpus that increasingly consists of unlabeled prior-model output scraped back off…

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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 surrounding passage

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