Johann Faulhaber (5 May 1580 – 10 September 1635) was a German mathematician, specifically, a calculator (Rechenmeister).
Biography
Born in Ulm, Faulhaber was a trained weaver who later took the role of a surveyor of the city of Ulm. He collaborated with Johannes Kepler and Ludolph van Ceulen. In 1620, while in Ulm, Descartes probably corresponded with Faulhaber to discuss algebraic solutions of polynomial equations.[1]
He worked as fortification engineer in various cities (notably Basel, where he was fortification engineer from 1622 to 1624, and Frankfurt), and also worked under Maurice, Prince of Orange in the Netherlands. He also built water wheels in his home town and geometrical instruments for the military.
Other than his mathematical work, he also worked on various mystical matters, such as alchemy, astrology and numerology. He was a member of the Rosicrucians. In 1619, after his involvement in the Ulm comet dispute, he published his work Fama Syderea Nova, containing prophecies in connection with the Great Comet of 1618 and the beginning of the Thirty Years' War. The Ulm comet dispute concerned whether the comets appearing during 1618 were signs sent by God, or just natural phenomena.[3][4]
Andeutung/ Einer vnerhorten newen Wunderkunst. Welche der Geist Gottes/ in etlichen Prophetischen/ vnd Biblischen Geheimnuß Zahlen/ biß auff die letzte Zeit hat wollen versigelt und verborgen halten. Nürnberg 1613
Neuer Arithmetischer Wegweyßer, Ulm 1614
Wunderliche Erfindung auß Albrecht Dürers seeligen Alten Invention. Vom Gläßern Perspectiv Tisch/ mit einem Proportional Instrument verbessert. Ulm: Johannes Meder 1617
Fama siderea nova, Nürnberg 1619
Miracula Arithmetica, Augsburg 1622
Mechanische Verbesserung einer alten Roßmühlen, Ulm 1625
Geheime Kunstkammer. Darinnen hundert allerhand Kriegs Stratagemata, auch andere Vnerhorte Secreta, vnd Machinae mirabiles zusehen/ dergleichen in Europa (respective) wenig zu finden, Ulm 1628
^Date, name, ratio, cents: from equal temperament monochord tables p55-p78; J. Murray Barbour Tuning and Temperament, Michigan State University Press 1951
^Schneider, Ivo. "Between Rosicrucians and Cabbala-Johannes Faulhaber's Mathematics of Biblical Numbers." Mathematics and the divine: a historical study (2005): 311-330.
Faulhaber, Johannes (1631). Academia Algebrae, darinnen die miraculosische Inventiones, zu den höchsten Cossen weiters continuirt und profitiert werden. Ulm. SLUB Dresden