Nicole Oresme , born in the village of Germany (current the Fleury-on-Flowering ash) in 1325 and died in Lisieux the July 11th 1382, was a economist, Mathématicien, Physicien, Astronome, Philosophe, Psychologue, Musicologue, Théologien and translator French.
Called the “Einstein of”, this scientist in advance over his time, whose ideas were a prelude to with those of the Renaissance, was one of the principal founders and popularizers of the modern sciences, and probably the most original thinker of his century. One knows practically nothing about his family. The fact that it made its studies with the Collège of Navarre, establishment active and subsidized by the king for the too poor students to pay their school fees with the Université of Paris constitutes a probable indication of its country origins. All its life proceeded during the Guerre One hundred Year old, the Normandy often being then occupied by the England.
He studies the “artes” with Paris (before 1348), with Jean Buridan (recognized like the founder of the French school of natural philosophy), Albert of Saxony and perhaps Marsile d' Inghen and receives his Magister Artium . In 1348, it studies the Théologie in Paris. It obtains its Doctorat in 1356 and becomes, the same year, large-Master of the Collège of Navarre.
The majority of its Latin treaties most interesting go back to before 1360 and prove that it was already an academic established with the most raised reputation, which drew the attention of the royal family and in intimate contact with the future Charles V in 1356 put it. Starting from 1356, during the captivity of his/her father Jean II in England, Charles was regent then king de France of 1364 with 1380. The November 2nd 1359, he becomes secretary of the king before becoming thereafter, chaplain and advising of the king.
A not proven long tradition but also makes him to it tutor of the Dauphin, future Charles V which seems to have held the character and the talents of Nicole Oresme in very high regard, often took its advice and many works in French made it write in order to popularize sciences and to develop the taste of the scholarship in its kingdom. It is with its insistence that he made a speech denouncing the disorders of the Église before the papal court of Avignon. The force of the probable influence of the political, economic, moral thought and philosophical progressist of Nicole Oresme on king Charles “the Wise one” of which he was the friend and the intimate adviser, until the death of this last, still remains to be been studied. It was, at the court of Charles V who often used his great diplomatic matter competences, the most important person of a selected circle of intellectuals including/understanding, inter alia, Raoul de Presles, Philippe de Mézières.
Its sending on mission by the dolphin in 1356, then in 1360 to request a loan near the municipal authorities rouennaises proves royal confidence in its capacities. In 1361, whereas he was still large-Master of the College of Navarre, he is named, with the support of Charles, archdeacon of Bayeux. It is known that this impassioned academic unwillingly returned his station coveted of large-Master. The November 23rd 1362, the year when he becomes Master in theology, he is named Chanoine Cathédrale of Rouen. At the time of its nomination at this station, he teaches always regularly at the university of Paris. The February 10th 1363, it is named canon with the Holy Vault, receives a half-benefit and is high the March 18th 1364 at the station of Doyen of the cathedral of Rouen. It is probable that the Charles dolphin influenced by his suggestions the decisions of his/her father Jean II concerning with the frequent changes of stations of Oresme.
These consecutive stations with the cathedral of Rouen (1364 - 77) do not prevent it from spending much time, particularly for the university businesses, in Paris, without the many documents attesting of its presence in the capital proving that it also taught there. Letters sent by Charles V to Rouen of the August 28th to the November 11th 1372 establish a coincidence between the beginning of its uninterrupted stay with Paris and the beginning of its prolonged activities of translation at the request of the king. Its residence in Paris seems to be prolonged by Charles V until 1380, when it started to work in 1369 with his translation of the Éthique of Aristote, which seems to be completed in 1370. Those of the Political and the Économiques of the same philosopher could be accomplished between the years 1372 and 1374, and the Of caelo and mundo in 1377. Its great work was worth to him, as of 1371, a pension of the royal treasure. Its untiring work for Charles V and the royal family also was worth to him, with the support of the king, the station of bishop of Lisieux, the August 3rd 1377. It took residence with Lisieux only in September 1380 and one does not know large thing over the five last years of his life. It was, with its death which has occurred two years after that of Charles V, buried in the cathedral of Lisieux.
Beside longitude and latitude of a form, it considered the will mensura or quantitas of a form proportional to the surface of the figure which represents it. It proved this theorem: a form uniformiter difformis with the same quantity as a form uniformis of the same longitude and whose latitude is the average between the two extreme limits of the first. It then proved that its method to appear the latitude of the forms can apply to the movement of a point, provided that time is taken as longitude and speed like latitude; the space covered in a given time constitutes the quantity then.
The theorem of the latitude uniformiter difformis became, under the terms of this transposition, the law of the space crossed in the event of uniformly varied movement. The demonstration is identical to that to which Galileo will proceed to. This law was never forgotten besides during the interval separating Oresme from Galileo because she was taught with Oxford by William Heytesbury and her disciples, then in Paris and in Italy, by all the following disciples of this school. In the middle of, a long time before Galileo, Dominican the Domingo de Soto applied this law to the uniformly accelerated fall of the heavy bodies and to the rise uniformly decreasing of the projectiles.
In the Algorismus proportionum and the Of proportionibus proportionum , Oresme developed the first method of calculating of the powers with exposing irrational fractional, i.e. calculation with irrational proportions ( proportio proportionum ). The base of this method was the equalization of the continuous sizes and the discrete numbers, idea drawn by Oresme from the theory from the music monocorde ( sectio canonis ). This enabled him to overcome prohibition pythagorician of the regular division of the intervals pythagoricians like 8/9, 1/2, 3/4, 2/3 and enabled him to produce the moderate Gamme two centuries and half before Simon Stevin. Example of division equalizes octave in 12 parts:
Oresme used, for example, this method in its musical section of the Tractatus of configurationibus qualitatum and motuum in the context of its “theory of the partial tonality or Harmonique (see below) to produce proportions of its irrational (ugly stamp or color of tonality) in the direction of the “continuum of partial tonality” (“white vibration”).
Oresme was interested much in the limits, the values threshold and the series by means of vector additions ( Tractatus of configurationibus qualitatum and motuum , Questiones super geometriam Euclidis ) which prepared the way with the infinitesimal calculus of Descartes and of Galileo. It proved the divergence of the series harmonics by means of the standard method always taught in the courses of analyzes mathematical current.
For the prefiguration of Oresme of the Stochastic modern, cf will infra the heading “Philosophy natural”. Taschow indeed showed how Nicole Oresme transformed the graphic method, evoked above, of sound Tractatus of configurationibus qualitatum and motuum of the musical theory of her time. From there one comes to the important contributions from Oresme in the field from musicology.
Oresme sought the parameters of the sonus by the experimentation on the level microstructurel and acoustics of the simple tonality and on the level macrostructurel of unison or the polyphonic music. While trying analytically to capture the various physical parameters, psychological and esthetics of the sonus according to the extensio and the intensio , Oresme wished to represent them like conditions with the infinitely variable categories of pulchritudo and turpitudo . It pushed this method on a level which, representing the mathematical description most complete of the musical phenomena before the Discorsi of Galileo, does not know any equivalent with the Moyen-âge. It is to note that this research led it to discover not only the your partial or harmonic sounds three centuries before Marin Mersenne, but also to identify the relation between the harmonics and the color of the tonality, which it explained in a detailed physicomathematical theory, whose level of complexity was not to be reached again before with Hermann von Helmholtz.
It is also necessary to mention interpretation mechanist of Oresme in his Tractatus of configuratione and qualitatum motuum of the sonus like a discontinuous specific type of movement (vibration), of resonance like phenomenon of harmonic and the relation of Consonance and Dissonance, which exceeded even the successful but false theory of the coincidence of the consonance formulated with.
The demonstration of Oresme of a correspondence between a mathematical method ( configuratio qualitatum and motuum ) and a physical phenomenon (its) constitutes a particularly rare case, at the same time for, in general, and for the work of Oresme, in particular. The sections of the Tractatus of configurationibus treating music constitute big steps in the development of the spirit of quantification which characterizes the modern time.
Oresme, the youngest friend of Philippe of Vitry, the theorist of the music, type-setter and bishop of Meaux, is the founder of modern musicology. Oresme dealt with almost each category of musicology (see Taschow, COp cit.) with the modern direction like:
With its very special theory of the species ( multiplicatio specierum ), Oresme correctly formulated the first theory of the wave mechanics of the sound and the light, three centuries before Huygens with its description of a pure transport of energy without material propagation. The final species with the direction where hears Oresme means the same ones as the modern term of “form of wave”.
Oresme also discovered, three centuries years before Mersenne, the phenomenon of the partial or “harmonic” tonalities and, four centuries and half before Joseph Sauveur, the relation between the features and the tonality of color. In its “very detailed physicomathematical theory of the tonalities and partial tonalities of color”, Oresme preceded the theory of Hermann von Helmholtz.
The musical esthetics of Oresme formulated a “modern subjective theory of the perception”, which was not the perception of the objective beauty of divine creation, but the constructive process of the perception, which causes the significant perception of the beauty or the ugliness. Consequently, one can see that each individual perceives another “world”.
Several of the intuitions of Oresme in other disciplines like mathematics, physics, philosophy, psychology, which announces the image of oneself modern times, are closely related to the musical model, which is unusual in the current thought. The Musica functioned like a kind of “medieval computer” and in this direction, an extensive anthem with the new analytico-quantitative conscience represented of.
In its “theory of modern knowledge”, Oresme proved that no thought, category, limiting, quality or quantity exist out of the conscience. He uncovered, for example, alleged “primary qualities” as the size, the position, the shape, the movement or the rest, etc of the scientists of such as Galileo, Locke etc, who had been regarded as objective in external nature, but which was to be seen like very complex cognitive constructions of psyché under the various individual conditions of the bodies and the heart human. Since reality exists only at the time “without expansion” ( instantia ), Oresme in deduced that no movement, except in the conscience, could exist. This means that the movement results from human perception and of the memory within the meaning of the composition the “front one activates” and “afterwards”. This sagacious theory becomes plausible, for example, in the field of the sound. Oresme wrote: “if there was a creature without memory, this one could never hear any sound… The sound is thus nothing more than one human construction.
In its “psycho-cybernetics” and its “information theory” modern, Oresme solved the problem of the dualism of the physical and psychic world by employing the diagram of the species in three parts “species” “matter” “quality significant” of its brilliant “theory of the species” (in modern terms: information - medium - significance). The transportable species (information), like a “form of wave” of sound, changes medium (wood, air, water, nervous system, etc) and the interior direction ( sensus interior ) built, from it, a subjective significance by means of “unconscious conclusions”.
Oresme had already developed a psychophysical first which shows many similarities with the approach of Gustav Theodor Fechner, the founder of psychophysical modern. The designs of psyché of Oresme are strongly mechanists. The physical and psychic processes are equivalent in their structure of movement ( configuratio qualitatum and motuum ). Each structure being equipped one qualitative moment (physical) and quantitative (psychic), the psychological processes (intensities) can consequently be measured like the physical processes. Oresme thus ensured the first scientific legitimation of the measurement of psyché and even, against Aristote and the scholastics, of the “immaterial heart”.
Oresme nevertheless primarily concentrated on the psychology of perception. the weather composed, was single with the Middle Ages, a special treaty on perception and its disturbance and mislaying ( Of causis mirabilium ) in many parts of its writings, where it examined each direction (seen, hearing, touch, sense of smell, taste) and the cognitive functions. With the same method as that used by the psychologists of, namely by the analysis of mislayings and the disturbances, Oresme had already identified many essential laws of perception, for example the figurative laws five centuries before Christian von Ehrenfels, the limits (maximum and minimum) of perception, etc (see Taschow, COp cit.)
The excellent model of this new infinite world of (contrary to the repetitions without end of the ancient musica mundana ) lay in the machina musica of Oresme for which the music proved in a similar way infinitely that with a limited number of proportions and parameters, one could produce very complex structures, changeantes and never repeating itself ( configurationibus qualitatum and motuum , Of commensurabilitate vel incommensurabilitate , Quaestio countered divinatores ). The message is the same one as in the theory of the chaos of where the iteration of the simplest formulas an extremely complex world stripped of any foreseeability of behavior produces.
Oresme ended up creating, starting from the principles musico-mathematics of incommensurability , irrationality and complexity , a dynamic model structural for the constitution of the substantial species and the individuals of nature, the theory known as of perfection of the species (“perfectio specierum”) ( Of configurationibus qualitatum and motuum , super Quaestiones of generatione and corruptione , Tractatus of perfectionibus specierum ) where the individual oresmien changes, thanks to the use of an analogy of musical qualities with “qualities first and seconds” of Empédocle, in car-organized system which takes the trouble to enter its state of optimal system in order to defend against the environmental influences dérangeantes. This “automatic loop of check” influences the substantial form ( formed substantialis ), already presents to the modern direction, in the principles of the biological evolution, the Adaptation and the change of the genetic material.
It is completely obvious that the revolutionary theory of Oresme exceeded the dogma scholastic aristotelician of the invariable substantial species and preceded the principles of the “theory of the system”, of the “car-organization” and the “biological evolution” of Darwin.
Another very progressive approach of Oresme was its extensive research to the approximate values and statistical measures by means of margins of error. He formulated his “theory of probability” in the fields of psychology, physics and mathematics. He, for example, laid down two psychological rules ( Of causis mirabilium ), the first rule saying that the probability of the erroneous judgments increases with the increase in the number of unconscious judgments of perception (depth of the significance) and therefore, the probability of the errors of perception. The second rule says that the more the number of “unconscious judgments” of perception exceeds a diffuse limit and the more improbable one fundamental error of perception is, because it never breaks up the large majority of the unconscious judgments. The consequence for the theoretical knowledge of those according to one or the other of these rules is that perception is nothing more than one value of probability in the fuzzy zone of these two rules. Perception is never an objective “photography” but a complex construction without absolute obviousness.
Oresme provides an example of the mathematical prefiguration by elements of the Stochastique when it states in its proportionibus proportionum : “if we take a finished multitude of positive integers, then it is the number of perfect integers or the number of cubes lower than of other numbers. ” Moreover, more we take numbers and more the relation of not-cubic with the cubes or imperfect integers with the integers is large. Consequently, if we do not know something about a number, it is then probable ( verisimile ) that this number is not a cube. It is as in a play ( sicut is in ludis ) where somebody asks whether a hidden number is a cube. It is surer to answer “Not” because it is what appears most probable ( probabilius and verisimilius ). Oresme considered then a multitude of 100 various mathematical objects which it had made of a certain manner and it determined that from this one, one could form (100 * 99): 2 = 4950 combinations of two elements each one. Those, 4925 show a certain interesting quality E, while the remainders do not have this quality E Finally., Oresme calculated quotient 4925: 25 = 197: 1 to conclude from it that it was probable ( verisimile ) that, if somebody seeks such an unknown combination, this one will have quality E. Oresme thus calculated the number of successful and unfavourable outcomes and their quotients, but it did not have yet the quotient of the number of the number of favorable and the integer of cases of equal possibility. It did not have yet the “measurement of the modern probability”, but it had however developed a brilliance tool to judge “facility” to arrive quantitatively at an event. Oresme had recourse, in its probability calculuses, in the terms like verisimile , probabile / probabilius , improbabile / improbabilius , verisimile / verisimilius / maxim verisimile and possibile equaliter . Nobody before him, and even a long time after him, used of these terms in the context of the plays and the random probabilities. One will find the methods of Oresme later at Galileo and Pascal with.
An example of the use of the theory of probability of Oresme in physics appears in Of commensurabilitate vel incommensurabilitate , Of proportionibus proportionum , AD pauca respicientes etc when Oresme states: “if we take two unknown normal sizes like the movement, time, the distance, etc, it is more probable ( verisimillius and probabilius ) that the relationship between these two is irrational rather than rational. This theorem which, according to Oresme, generally applies to very whole nature, in the terrestrial and celestial world, has a great effect on the sights of Oresme of the Nécessité and the contingency, and therefore, on its sights of the natural law ( light naturae ) and its criticism of the Astrologie.
It is obvious that the searchs for Oresme on the music inspired its theory of probability in physics, mathematics and psychology of perception: division monocorde ( sectio canonis ) proved the direction of hearing, and the mathematical reason proved clearly that the majority of divisions of cord produce irrational intervals, i.e. dissonant.
It is not surprising that, dealing with questions of wave mechanics, the sound and the light, Oresme was the first to be theorized that the nature of the color and the light are identical. It was right completely to suppose that the color is only of the broken and reflected white light, i.e. “the colors belong to the white light”. This brilliant theory moreover was inspired by its musicologic investigations: in its theory of the harmonics and color of tonality, it established an analogy between these musical facts and the phenomenon of the mixture of colors on a lathe.
Lastly, it there with the brilliant discovery of Oresme of the curve of the light by atmospheric refraction: in its treaty Of views stellarum , it asks whether the stars are really where they appear to be. The use of optics enabled him to answer by the negative one. Two centuries before the scientific revolution, Oresme proposed the qualitatively correct solution with the problem of the atmospheric refraction, namely that the light travels along a curve by a medium of density uniformly variable. Oresme arrived at this solution while making use of infinitesimal to throw the doubt about all the visual significant data by concluding that almost nothing in the skies or on ground is really where it is seen. This solution which had escaped with Ptolémée and Alhazen had even escaped with Kepler with and until now, it is Hooke which was credited for its discovery and Newton for its mathematical resolution.
These fragments of the monumental work of Oresme show that it was one of the most innovating scientists at the dawn of the modern age and a pioneer of the modern world.
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