- In mathematical logic, Russell’s paradox (also known as Russell’s antinomy) is a set-theoretic paradox published by the British philosopher and mathematician Bertrand Russell in 1901. Russell’s paradox shows that every set theory that contains an unrestricted comprehension principle leads to contradictions. The paradox had already been discovered independently in 1899 by the German mathematician Ernst Zermelo. However, Zermelo did not publish the idea, which remained known only to David Hilbert, Edmund Husserl, and other academics at the University of Göttingen. At the end of the 1890s, Georg Cantor – considered the founder of modern set theory – had already realized that his theory would lead to a contradiction, as he told Hilbert and Richard Dedekind by letter.
- Chelan County — Thumbnail History (historylink.org)
Chelan County embraces the drainages of the Wenatchee River, the Entiat River, and Lake Chelan, and the Chelan River for a total of 2,920 square miles. Irrigation has transformed the arid valleys into agricultural treasure houses and the home to Washington apples and the ubiquitous Aplet and Cotlet confections. Hydroelectric development has lived up to the Wenatchee Daily World’s claim, first made in the 1920s, that the region is the “Power Belt of the Great Northwest.” Almost 90 percent of the county is owned by the state and federal governments.