Mathematician:Johannes Müller von Königsberg

Mathematician
Better known under his Latinized name (Johannes Müller) Regiomontanus: both surnames mean King's mountain.

German mathematician, astronomer, astrologer, translator, instrument maker and Catholic bishop.

Pupil of, whose uncompleted work he continued.

Set up a printing press at Nuremberg in for printing scientific works.

First publisher of such scientific literature.

Became internationally famous within his own lifetime.

Nationality
Dutch, of German origin

History

 * Born: 6 June 1436 in Unfinden (near Königsberg), Lower Franconia (now in Bayern, Germany)
 * 1447: Joined University of Leipzig to study dialectics
 * 14 April 1450: Entered the University of Vienna to become pupil of
 * 16 January 1452: Awarded a baccalaureate
 * 1457: Awarded a Master's Degree (on reaching required age of 21)
 * 11 November 1457: Appointed to the Arts Faculty of the University of Vienna to study under
 * 1458: Delivered course on perspective
 * 1460: Delivered course on
 * 1461: Delivered course on Virgil's Bucolics
 * 1461: Took over the work to complete Epytoma in Almagesti Ptolemei started by
 * 20 November 1461: Travelled to Italy under patronage with Cardinal Bessarion
 * 1461 to 1465: Based in Rome as a member of Bessarion's extended household
 * Summer 1462: At Viterbo with Bessarion
 * Autumn 1462: Accompanied Bessarion as far as Venice
 * 1462: found an incomplete copy of 's
 * 5 July 1463: Left Rome
 * Spring 1464: Lectured at the University of Padua in the Venetian Republic
 * 21 April 1464: Observed the total eclipse of the moon
 * August 1464: Returned to Rome after death of the Pope Pius II
 * 19 June 1465: Made an observation at Viterbo
 * 1467: In Hungary, having accepted an appointment from the King to the Royal Library in Buda
 * c. 1471: Moved to Nuremberg
 * 1471-1472: in he set up a printing press in his own house in Nuremberg
 * 1476: summoned to Rome by Pope Sixtus IV to advise on calendar reform
 * Died: 6 July 1476 in Rome, Italy of unknown causes (probably plague, but rumoured to have been poisoned)

Theorems

 * Regiomontanus' Angle Maximization Problem
 * Law of Sines for Spherical Triangles
 * Law of Cosines for Spherical Triangles

Publications

 * 1462: Epytoma in Almagesti Ptolemei (begun by )
 * 1463: a translation of by  (incomplete)
 * 1464: De Triangulis Omnimodus, one of the first textbooks on trigonometry
 * 1467: Tabulae directionum (Tables of Directions), a manual for calculating astrological houses
 * 1474: Kalendarium
 * 1474: Ephemerides


 * Algorithmus Demonstratus
 * Introductory Discourse on All the Mathematical Disciplines
 * Theoricae novae Planetarum
 * The Defence of against 
 * Scipta

Also known as

 * Johann Müller
 * Johannes Molitoris de Künigsperg (Molitoris is a Latin form of Müller)
 * Johannes Germanus (Johann the German)
 * Johannes Francus (Johannes from Franconia)
 * Johann von Künigsperg (Johann from Königsberg)
 * Joannes de Monte Regio (used by Gassendi in his biography)
 * Regiomontus (possibly erroneously)
 * At least one online source has Regionontanus, which is clearly erroneous.