# Frases de Simon Stevin

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## Simon Stevin

Data de nascimento: 1548
Data de falecimento: 1620

Simon Stevin foi um engenheiro, físico e matemático flamengo

### Citações Simon Stevin

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### „The Rule of Three, or Golden Rule of Arithmeticall whole Numbers. Be the three termes given 2 3 4. …To finde their fourth proporcionall Terme: that is to say, in such Reason to the third terme 4, as the second terme 3, is to the first terme 2 [Modern notation: \frac{x}{4} = \frac{3}{2}]. …Multiply the second terme 3, by the third terme 4, & giveth the product 12: which dividing by the first terme 2, giveth the Quotient 6: I say that 6 is the fourth proportional terme required.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „…the use of the Disme …to teach such as doe not already know the use and practize of Numeration, and the foure principles of common Arithmetick, in whole numbers, namely, Addition, Substraction, Multiplication, & Division, together with the Golden Rule, sufficient to instruct the most ignorant in the usuall practize of this Art of Disme or Decimall Arithmeticke“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „Our intention in this Disme is to worke all by whole numbers: for seing that in any affayres, men reckon not of the thousandth part of a mite, grayne, &c. as the like is also used of the principall Geometricians, and Astronomers, in computacions of great consequence, as Ptolome & Johannes Monta-regio have not described their Tables of Arches, Chords, or Sines, in extreme perfection (as possibly they might have done by Multinomiall numbers,) because that imperfection (considering the scope and end of those Tables) is more convenient then such perfection.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „If all this be not put in practize… it wil be beneficiall to our successors, if future men shal hereafter be of such nature as our predecessors, who were never negligent of so great advantage. …they may all deliver them selves when they will, from so much and so great labour.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „[The books of Euclid pass on to us] something admirable and very necessary to see and to read, namely the order in the method of writing on mathematics in that aforementioned time of the wise age.“

Géographie, in Les Oeuvres Mathématiques de Simon Stevin de Bruges (1634) ed. Girard, p. 109, as quoted by Jacob Klein]], Greek Mathematical Thought and the Origin of Algebra (1968)

### „We call the wise age that in which men had a wonderful knowledge of science which we recognize without fail by certain signs, although without knowing who they were, or in what place, or when. …It has become a matter of common usage to call the barbarous age that time which extends from about 900 or a thousand years up to about 150 years past, since men were for 700 or 800 years in the condition of imbeciles without the practice of letters or sciences—which condition had its origin in the burning of books through troubles, wars, and destructions; afterwards affairs could, with a great deal of labor, be restored, or almost restored, to their former state; but although the afore-mentioned preceding times could call themselves a wise age in respect to the barbarous age just mentioned, nevertheless we have not consented to this definition of such a wise age, since both taken together are nothing but a true barbarous age in comparison to that unknown time at which we state that it [i. e., the wise age] was, without any doubt, in existence.“

Géographie, in Les Oeuvres Mathématiques de Simon Stevin de Bruges (1634) ed. Girard, p. 106-108, as quoted by Jacob Klein, Greek Mathematical Thought and the Origin of Algebra (1968)

### „The seventh Definition. The Golden Rule, or Rule of three, is that by which to three tearmes given, the fourth proportionall tearme is found.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „The sixt Definition. A Whole number is either a unitie, or a compounded multitude of unities.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „The first Part. Of the Definitions of the Dismes. The first Definition. Disme is a kind of Arithmeticke, invented by the tenth progression, consisting in Characters of Cyphers; whereby a certaine number is described, and by which also all accounts which happen in humane affayres, are dispatched by whole numbers, without fractions or broken numbers.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

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### „The second Definition. Number is that which expresseth the quantitie of each thing.“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)

### „Multiplication of whole Numbers …Note, that for the more easie solution of this proposition, it were necessary to have in memory the multiplication of the 9 simple Characters among themselves, learning them by rote out of the Table here placed…“

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)