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{{Short description|Austrian mathematician (1800–1864)}} |birth_date={{birth date|1800|1|1|df=y}} ...

...utation]]s, Rothe was the first to define the inverse of a permutation, in 1800. He developed a technique for visualizing permutations now known as a [[Rot In his 1800 work on permutations, Rothe also was the first to consider permutations tha ...

...18|title=Religion and religious institutions in the European economy, 1000-1800|last=studio|first=Istituto internazionale di storia economica F. Datini Set [[Category:1710 births]] ...

...y Gray]], [[Karen Parshall]]: ''Episodes in the history of modern algebra (1800-1950)'', American Mathematical Society 2007 [[Category:1950 births]] ...

...and was elected to the [[Royal Danish Academy of Sciences and Letters]] in 1800.<ref name = Runeberg/> [[Category:1766 births]] ...

...S.|title=Ladies in the Laboratory? American and British Women in Science, 1800-1900: A Survey of their Contributions to Research|date=2000|publisher=Scare [[Category:1868 births]] ...

The total number of births globally is currently (2015–2020) 140 million/year, which is projected to p ...bitants in 2020. Only 3% of the world's population lived in urban areas in 1800; this proportion had risen to 47% by 2000, and reached 56% by 2020.<ref>{{c ...

* 1800 – New University examination statute establishes rigorous written examinati ...ok|first=Malcolm|last=Graham|chapter=The Growth and Impact of Oxford after 1800|pages=146–7|editor=Tiller, Kate |editor2=Darkes, Giles |title=An Historical ...