definition claim
The De Bruijn ratio measures how many lines of Lean code are needed per line of informal mathematics in a LaTeX document.
Unresolved speaker · Mathematics Just Changed Forever — Kevin Hartnett · 26 Oct 2026
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“There's a ratio called the De Bruijn ratio, which is the amount of lines of code you need to write in Lean for every one line of informal math, like in a LaTeX PDF.”11:49Report a misattribution
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