Harnack's inequality

Rarity: Common

The most frequent rarity: most Wikipedia articles become Commons.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

In collections

Nobody has pulled it yet.

What Wikipedia says

In mathematics, Harnack's inequality is an inequality relating the values of a positive harmonic function at two points, introduced by A. Harnack (1887). Harnack's inequality is used to prove Harnack's theorem about the convergence of sequences of harmonic functions.

Excerpt from the Wikipedia article “Harnack's inequality”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Trevorgoodchild at English Wikipedia, CC0, via Wikimedia Commons.