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- Q27323 description "German mathematician".
- Q27323 description "German mathematician".
- Q27323 subject Q18219973.
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- Q27323 abstract "Friedrich Risner (c.1533 – 15 September 1580) was a German mathematician from Hersfeld [1], Hesse. He was an assistant to Petrus Ramus (from around 1565) and was the first chair of mathematics at Collège Royale de France (1576).Risner is known for his 1572 publication of "Opticae thesaurus: Alhazeni Arabis libri septem, nuncprimum editi; Eiusdem liber De Crepusculis et nubium ascensionibus, Item Vitellonis Thuringopoloni libri X", an edition of works by Ibn al-Haitham and Erazmus Ciolek Witelo, two men who were both early pioneers in the field of optics. The publication became a major benefit to a number of mathematicians and scientists, such as Kepler, Huygens, and Descartes.He was the first to propose the idea of a portable camera obscura, which purportedly was to be used as an aid in the creation of artistic works. His idea consisted of a lightweight wooden hut that had small holes fitted with lenses in each wall, and a cube of paper placed in the centre for drawing.After St. Bartholomew's Day massacre, Risner fled back to Hersfeld and died there eight years later. Risner was buried in Hersfeld Abbey, where his gravestone is well preserved.The Latin circumscription on the gravestone is: "Anno Domini 1580. 17. Cal. Octob. pie in Christo obiit clariss. vir Fridericus Risner insignis et praestantissimus Mathematicus qui hic terrae mandatus sonitum tubae expectat aetatis suae 47."English translation of the inscription above is: "In year 1580 at 15th of September, died in Christ at the age of 47, the well famous Friedrich Risner, an outstanding, excellent mathematician, who passed to soil here, will expect the sound of trumpet."".
- Q27323 birthPlace Q16145.
- Q27323 deathDate "1580-09-15".
- Q27323 deathPlace Q16145.
- Q27323 deathYear "1580".
- Q27323 thumbnail Hersfeld_frisner_gravestone.jpg?width=300.
- Q27323 wikiPageExternalLink De_Merian_Hassiae_128.jpg.
- Q27323 wikiPageExternalLink history.htm.
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- Q27323 wikiPageWikiLink Q6013177.
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- Q27323 wikiPageWikiLink Q7820645.
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- Q27323 dateOfDeath "1580-09-15".
- Q27323 name "Risner, Friedrich".
- Q27323 placeOfBirth "Hersfeld".
- Q27323 placeOfDeath "Hersfeld".
- Q27323 shortDescription "German mathematician".
- Q27323 type Person.
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- Q27323 comment "Friedrich Risner (c.1533 – 15 September 1580) was a German mathematician from Hersfeld [1], Hesse.".
- Q27323 label "Friedrich Risner".
- Q27323 depiction Hersfeld_frisner_gravestone.jpg.
- Q27323 givenName "Friedrich".
- Q27323 name "Friedrich Risner".
- Q27323 name "Risner, Friedrich".
- Q27323 surname "Risner".