Henricus Grammateus

Heinrich Schreiber (also known as Henry or Henricus Grammateus Grammateus; * before 1496, probably in 1492 in Erfurt, † winter 1525/1526 in Vienna ) was a German mathematician and astronomer.

Schreiber matriculated in 1507 at the University of Vienna, studied Connect 1514 to 1517 in Cracow and then returned to Vienna, where he appears as Magister Henricus Gramatheus in a session log. In Vienna he was the teacher of the mathematician Christoph Rudolff. When the University of Vienna was in 1521 closed due to the plague, he went to Nuremberg, where he published several writings on Applied Algebra and practical astronomy, including 1518 Ayn new artificially Buech ... in which he for the first time throughout the symbols " " and "-" used for addition and subtraction. Next he treats in addition to problems of algebra:

  • Computing on the lines,
  • Rule of three ( rule of three )
  • Regula falsi,
  • Proportions in music (harmony ),
  • " Welsh practice " (practical arithmetic, as it was used by North Italian merchants )
  • Accounting and
  • The barrel measurement with the Visierrute.

From 1525 onward, he was back in Vienna, where he is assigned as an examiner of Baccalaureanden and procurator of the Saxon nation. Soon after, he died at about 33 years in Vienna.

Writings

  • Algorithm proportionum una cum monochordi generalis dyatonici compositione ( Krakow 1514)
  • Libellus de compositione regularum mensuratione per vasorum. Deque ista arte et tota theoreticae practicae (Vienna 1518)
  • Ayn new artificially Buech which does certainly VND learn to nimbly after gemainen rule detre Grammateum or Schreyber ( Stuchs, Nuremberg 1518)
  • Nimbly unnd khunstlich bill square according to the rules and welhisch practic with sambt zuberaittung the visor and triangle- ym ( Stuchs, Nuremberg 1521)
  • An artfully VND behendt Jnstrumet zuwissen a day bey the sun VND at night through the star mancherley nutzberperkeit vn abandoned sites in all the world vn Endings ( Hölzel, Nuremberg 1522)
  • Rechenbüchlin, artificial, nimble and certainly, auff all kauffmanschafft court ( Egenolf, Frankfurt aM 1572)
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