Interest
Proportion of Hacker News items mentioning "first-order" over time.
Mentions
Total number of Hacker News items mentioning "first-order" over time.
In mathematics and other formal sciences, first-order or first order most often means either:"linear", as in first-order approximation and other calculus uses, where it is contrasted with "polynomials of higher degree", or "without self-reference", as in first-order logic and other logic uses, where it is contrasted with "allowing some self-reference" Read more on Wikipedia