Fabrizio Mordente

Fabrizio mordents (* 1532 in Salerno, † 1608 ) was an Italian mathematician. He became famous for his invention allowed an eight- tip circle, the smallest graduations.

Life

He traveled long the Mediterranean countries and Central Europe. 1567 he was in Venice a treatise on his invention Print, dedicated to Daniele Barbaro. Around 1572 he went to the court of Maximilian II and from 1578 he was in Prague in the service of Rudolph II. Kaiser this he devoted another book on the circle, which was printed in Antwerp around 1584. Here he met Michel Coignet (1549-1623), who later in several writings dealt with the invention of mordents to know. Another important factor was his encounter with Giordano Bruno, the consideration of a smallest possible measurable unit stimulated with him.

To 1591, he handed in Alessandro Farnese services, the final version of a compass by the pressure. The accuracy of astronomical measurements was so much improved and a variety of practical mathematical operations possible.

The " proportion Circle "

Fabrizio murder Morientes significant invention is that of him as a compasso proporzionale otto punte ( proportion compass with eight points ) designated circle. It enabled the measurement of circumference, circle area and angle radians with unprecedented accuracy.

The dispute with Giordano Bruno

The first two dialogs that Bruno wrote in 1586 - Mordentius and De Mordenti circino - had the intention of the proportion circles of the scientific community to explain ( mordents self-possessed no Latin). He was referring to murder Morientes own publication, a printed sheet in Paris - it explained the functions of the circle - and the first work Morientes murder itself, which was published under the care of his brother Gaspare 1584 in Antwerp.

Insomnium of Giordano Bruno snubbed the inventor Fabrizio mordents deeply because Giordano Bruno should have the possibilities of its proportion Circle misused for " anti-Aristotelian philosophical considerations ". Mordents interpreted the publication of Bruno as ideological propaganda. From an exchange of letters between the Corbinelli and Gian Vincenzo Pinelli, we learn that Fabrizio mordents bought up all the copies and destroyed.

The reaction of Giordano Bruno was the publication of libels Idiota triumphans and De Somnii interpretatione in June 1586, before his departure from Paris.

Writings

• Gasparo mordents (ed.): Il compasso del signor Fabritio mordents. Con altri istromenti mathematici, Ritrovati Gasparo da suo fratello. Christophe Plantin, Antwerp 1584, new ed. by Filippo Camerota, Il compasso di Fabrizio mordents: per la storia del compasso di Proporzione, Olschki, Florence 2000 ( Biblioteca di Nuncius =, 37), ISBN 88-222-4853-8
• Il compasso, & figura ... con li quali duoi mezzi si un gran numero di fare possono Mirabili effetti, al tutto necessarj all'arte, faux rice della natura. Jean Le Clerc, Paris, March 20, 1585 [ broadsheet ]
• La quadratura del cerchio, la scienza de ' residui, il compasso et rigo, di di Gasparo et Fabritio mordents fratelli. Philip Galle, Anvers 1591
• Le propositioni di Fabritio mordents salernitano mathematico della sacra ces.a M.TA dell'imperatore Rudolfo II mediant le quali si può da hora inanzi sapere, come da numero, numero à la proportione, ch'e fra qual si uoglia due date specie di quantità continue. Antonio Giamin, Rome 1598