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Johannes Widmann
Johannes Widmann
(c. 1460 – after 1498) was a German mathematician. The + and - symbols first appeared in print in his book Mercantile Arithmetic or Behende und hüpsche Rechenung auff allen Kauffmanschafft published in Leipzig
Leipzig
in 1489 in reference to surpluses and deficits in business problems.[1] Born in Eger, Bohemia, Widmann attended the University of Leipzig
Leipzig
in the 1480s. In 1482 he earned his "Baccalaureus" (Bachelor of Art degree) and in 1485 his "Magister" (doctorate). Widman published Behende und hübsche Rechenung auff allen Kauffmanschafft (German; i.e. Nimble and neat calculation in all trades), his work making use of the signs, in Leipzig
Leipzig
in 1489.[1] Further editions were published in Pforzheim, Hagenau, and Augsburg. Handwritten entries in a surviving collection show that after earning his "Magister" Widman announced holding lectures on e.g. calculating on the lines of a calculating board and on algebra. There is evidence that the lecture on algebra actually took place, making it the first known university lecture on this topic.[citation needed] Around 1495 Widmann published the Latin writings Algorithmus integrorum cum probis annexis, Algorithmus linealis, Algorithmus minutiarum phisicarum, Algorithmus minutiarum vulgarium, Regula falsi apud philosophantes augmenti et decrementi appellata und Tractatus proportionum plusquam aureus. He died in Leipzig. When Adam Ries
Adam Ries
was in Erfurt
Erfurt
between 1518 and 1522 he got to know Widmann's algebra lecture script (today in the Saxon State Library) wherefrom he took examples for his own writings. References[edit]

^ a b Florian Cajori (1 June 2007). A History of Mathematical Notations -. Cosimo, Inc. p. 128. ISBN 978-1-60206-684-7. Retrieved 6 July 2013. 

Sources[edit]

Barbara Gärtner, Johannes Widmanns „Behende und hübsche Rechenung“. Die Textsorte „Rechenbuch“ in der Frühen Neuzeit, Tübingen 2000. (Germanistische Linguistik. 222.) M. Cantor, Vorlesungen über Geschichte der Mathematik II (Leipzig, 1913), 228-. K. Fogel, Merchants' aids in practical arithmetic from the Middle Ages (Russian), Istor.-Mat. Issled. No. 23 (1978), 235-249; 359. W. Kaunzner and H. Wussing (eds.), Adam Ries, Coss (B G Teubner Verlagsgesellschaft mbH, Stuttgart, 1992). Karl Röttel, Johannes Widmann
Johannes Widmann
– Am Wendepunkt der Mathematikgeschichte. In: Schatzkammer der Rechenkunst. Annaberg-Buchholz 2008. K. Vogel, Biography in Dictionary of Scientific Biography (New York 1970-1990). Franz Xaver Wilhelm, Zur Biographie des Mathematikers Johann Widmann von Eger. In: Mitteilungen des Vereins für Geschichte der Deutschen in Böhmen, Volume 45 (1907), pp. 429–430.

Authority control

WorldCat Identities VIAF: 40174145 LCCN: n88085438 ISNI: 0000 0000 5534 6026 GND: 118767712

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