Jacques Ozanam Zitate

Jacques Ozanam war ein französischer Mathematiker.

Ozanam stammte aus einer wohlhabenden, lange vor seiner Geburt konvertierten jüdischen Familie. Aus der gleichen Familie stammt der besser bekannte Frédéric Ozanam. Er studierte zunächst auf Wunsch des Vaters Theologie, war jedoch stärker von der Mathematik angezogen, die er im Selbststudium meisterte. Im Alter von 15 Jahren veröffentlichte er seine erste mathematische Arbeit. Nach dem Tod seines Vaters gab er sein Theologiestudium auf und begann, in Lyon kostenlosen privaten Mathematikunterricht zu geben. Später, als die Familiengüter an seinen älteren Bruder gegeben wurden, war er gezwungen, Gebühren für diesen Unterricht zu verlangen, zumal er als passionierter Spieler viel Geld verlor.

1670 veröffentlichte er trigonometrische und logarithmische Zahlentafeln, die genauer waren als die damals existierenden von Adriaan Vlacq , Bartholomäus Pitiscus und Henry Briggs. Da er so großzügig war, Geld ohne wirkliche Sicherheiten an zwei ihm unbekannte durchreisende Männer zu leihen, wurde Herr d’Aguesseau auf ihn aufmerksam, der ihn nach Paris einlud. Dort heiratete er, hatte eine große Familie mit zwölf Kindern und lebte gut davon, Mathematik für Privatschüler, meist Ausländer, zu lehren.

Ozanam publizierte zahlreiche Bücher, von denen sich viele gut verkauften und mehrmals aufgelegt wurden, insbesondere Récréations mathématiques et physiques, das später ins Englische übersetzt wurde. Mit diesem Werk der Unterhaltungsmathematik trug er zur Verbreitung von Mathematik bei . Les six livres de l’Arithmétique de Diophante augmentés et reduits à la spécieuse wurde von Leibniz lobend erwähnt. 1707 erhielt er bei der Académie royale des sciences den Status eines Schülers und 1711 den eines Partners. Der Tod seiner Frau stürzte ihn in tiefe Trauer, und durch den Verlust seiner Privatschüler wegen des Spanischen Erbfolgekrieges verarmte er. Er starb in Paris am 3. April 1718 .

Ozanam wurde im Ausland mehr geehrt als zuhause. Er war gläubig und hilfsbereit. Wikipedia

✵ 16. Juni 1640 – 3. April 1718

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Jacques Ozanam: Zitate auf Englisch

“To be perfectly ignorant in all the Terms of them is only tolerable in those, who think their Tongues of as little Use to them, as generally their Understandings are. Those whom Necessity has obliged to get their Bread by Manual Industry, where some Degree of Art is required to go along with it, and who have had some Insight into these Studies, have very often found Advantages from them sufficient to reward the Pains they were at in acquiring them. And whatever may have been imputed (how justly I'm not now to determine) to some other Studies, under the Notion of Insignificancy and Loss of Time; yet these, I believe, never caused Repentance in any, except it was for their Remissness in the Prosecution of them. And though Plato's Censure, that those who did not understand the 117 Prop. of the 10th Element, ought not to be ranked among Rational Creatures, wax unreasonable and unjust: Yet to give a Man the Character of Universal Learning that is destitute of a competent Knowledge in the Mathematics, is no less so.”

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Preface
A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702

“There are two general Methods made use of in the Mathematicks, viz. Synthesis and Analysis, which we shall explain, after having acquainted the Reader, that the Method we make use of to resolve a Mathematical Problem, is called Zetetick; and that that Method which determines when, and by what way, and how many different ways a Problem may be resolved, is called Poristick. But in treating of Methods, we will first premise, that in general, a Method is the Art of disposing a Train of Arguments or Consequences in a right Order, either to discover the Truth of a Theorem, which we would find out, or to demonstrate it to others, when found.”

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Quelle: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 26

“Mathematicks therefore is a Science which teaches or contemplates whatever is capable of Measure or Number as such. When it relates to Number, it is called Arithmetick; but when to measure, as Length, Breadth, Depth, Degrees of Velocity in Motion, Intenseness or Remissness of Sounds, Augmentation or Diminution of Quality, 6tc. it is called Geometry.”

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Quelle: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 1, The Introduction

“By Science is understood a Knowledge acquired by, or founded on clear and self evident Principles, whence it follows that the Mathematicks may truly be stiled such.”

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Quelle: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 1, The Introduction

“Arithmetic and geometry, according to Plato, are the two wings of the mathematician. The object indeed of all mathematical questions, is to determine the ratios of numbers, or of magnitudes; and it may even be said, to continue the comparison of the ancient philosopher, that arithmetic is the mathematician's right wing; for it is an incontestable truth, that geometrical determinations would, for the most part, present nothing satisfactory to the mind, if the ratios thus determined could not be reduced to numerical ratios. This justifies the common practice, which we shall here follow, of beginning with arithmetic.”

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Quelle: Recreations in Mathematics and Natural Philosophy, (1803), p. 2

“The sun, as we have already said, is placed in the middle of our system, as a source of light and heat, to illuminate and vivify all the planets subordinate to it. Without his benign influence the earth would be a mere block, which in hardness would surpass marble and the most compact substances with which we are acquainted; no vegetation, no motion would be possible: in a word, it would be the abode of darkness, inactivity and death. The first rank therefore among inanimate beings cannot be refused to the sun; and if the error of addressing to a created object that adoration which is due to the Creator atone could admit of excuse, we might be tempted to excuse the homage paid to the sun by the ancient Persians, as is still the ease among the Guebres, their successors, and some savage tribes in America.”

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Jacques Ozanam, Recreations in mathematics and natural philosophy : Volume 3 van Recreations in Mathematics and Natural Philosophy. Published 1803. p. 140

“Although the Mathematicks according to its Etymology, signifies only Discipline, yet it merits the Name of Science better than any other, because its Principles are self-evident, and independent on any sensible Experience, and its Propositions demonstrated beyond all possible Doubt or Opposition. Youth were anciently instructed herein before Philosophy, on which Account Aristotle called it the Science of Children. This was taught them not only to raise and excite their Genius, but also as a fit preparative to the Study of Nature; and it was upon this Account that the Divine Plato inscribed on his School… that none wholly ignorant of Geometry should be admitted there.”

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Quelle: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 1, The Introduction; Lead paragraph

“The Usefulness of the Mathematicks in General, and of some Parts of them in Particular, in the common Affairs of Humane Life, has rendered some competent Knowledge of them very necessary to a great Part of Mankind, and very convenient to all the Rest that are any way conversant beyond the Limits of their own particular callings.”

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Preface; lead paragraph
A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702

“It was the business of the Sorbonne doctors to discuss, of the pope to decide, and of a mathematician to go straight to heaven in a perpendicular line.”

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Quelle: Recreations in Mathematics and Natural Philosophy, (1803), p. xv

“The Essential Parts of the Simple or Pure Mathematicks are Arithmetick and Geometry, which mutually assist one another, and are independent on any other Sciences, except perhaps on Artificial Logick: But doubtless Natural Logick may be sufficient to a Man of Sense. The other parts are chiefly Physical Subjects explained by the Principles of Arithmetics or Geometry.”

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Quelle: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 2, The introduction

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