- When redirects are implemented, change to a standard URL for Wikimedia-hosted pictures.
- Looking downstream of the St. Croix River on a foggy day in December 2024. The river is frozen with patches of open water. A thin layer of snow is on the ground. The trees are dark and bare, with a thin fog covering the area.
- Ernst Zermelo (Wikipedia)
Ernst Friedrich Ferdinand Zermelo (/zɜːrˈmɛloʊ/, German: [tsɛɐ̯ˈmeːlo]; 27 July 1871 – 21 May 1953) was a German logician and mathematician, whose work has major implications for the foundations of mathematics. He is known for his role in developing Zermelo–Fraenkel axiomatic set theory and his proof of the well-ordering theorem. Furthermore, his 1929 work on ranking chess players is the first description of a model for pairwise comparison that continues to have a profound impact on various applied fields utilizing this method.
