(computing theory) One of the three rewrite rules of lambda calculus, which expresses a sort of tautology about function application. The rule says that a lambda abstraction of the form (𝜆x.(fx)) may be rewritten as simply f, provided that x does not occur freely in f (considered by itself).

Eta conversion.

plural of eta reduction

plural of eta conversion

plural of eta meson

(astronomy) A stellar system in the constellation of Carina.

The B.1.525 strain of the SARS-CoV-2 virus that causes COVID-19.

(mathematics, mathematical analysis) The alternating sum of the Dirichlet series expansion of the Riemann zeta function: 𝜂(s)=∑ₙ₌₁ ᪲(-1)ⁿ⁻¹/nˢ=1/(1ˢ)-1/(2ˢ)+1/(3ˢ)-1/(4ˢ)+⋯.

Misspelling of etatism or étatisme.

Synonym of statism, sometimes (derogatory) with specific distinctions derived from Mises's political theories.