A history of Greek mathematics Vol.II from Aristarchus to Diophantus by Heath, Thomas Little, Sir, 1921
MACEDONIA is GREECE and will always be GREECE- (if they are desperate to steal a name, Monkeydonkeys suits them just fine) ΚΑΤΩ Η ΣΥΓΚΥΒΕΡΝΗΣΗ ΤΩΝ ΠΡΟΔΟΤΩΝ!!! ΦΕΚ,ΚΚΕ,ΚΝΕ,ΚΟΜΜΟΥΝΙΣΜΟΣ,ΣΥΡΙΖΑ,ΠΑΣΟΚ,ΝΕΑ ΔΗΜΟΚΡΑΤΙΑ,ΕΓΚΛΗΜΑΤΑ,ΔΑΠ-ΝΔΦΚ, MACEDONIA,ΣΥΜΜΟΡΙΤΟΠΟΛΕΜΟΣ,ΠΡΟΣΦΟΡΕΣ,ΥΠΟΥΡΓΕΙΟ,ΕΝΟΠΛΕΣ ΔΥΝΑΜΕΙΣ,ΣΤΡΑΤΟΣ, ΑΕΡΟΠΟΡΙΑ,ΑΣΤΥΝΟΜΙΑ,ΔΗΜΑΡΧΕΙΟ,ΝΟΜΑΡΧΙΑ,ΠΑΝΕΠΙΣΤΗΜΙΟ,ΛΟΓΟΤΕΧΝΙΑ,ΔΗΜΟΣ,LIFO,ΛΑΡΙΣΑ, ΠΕΡΙΦΕΡΕΙΑ,ΕΚΚΛΗΣΙΑ,ΟΝΝΕΔ,ΜΟΝΗ,ΠΑΤΡΙΑΡΧΕΙΟ,ΜΕΣΗ ΕΚΠΑΙΔΕΥΣΗ,ΙΑΤΡΙΚΗ,ΟΛΜΕ,ΑΕΚ,ΠΑΟΚ,ΦΙΛΟΛΟΓΙΚΑ,ΝΟΜΟΘΕΣΙΑ,ΔΙΚΗΓΟΡΙΚΟΣ,ΕΠΙΠΛΟ, ΣΥΜΒΟΛΑΙΟΓΡΑΦΙΚΟΣ,ΕΛΛΗΝΙΚΑ,ΜΑΘΗΜΑΤΙΚΑ,ΝΕΟΛΑΙΑ,ΟΙΚΟΝΟΜΙΚΑ,ΙΣΤΟΡΙΑ,ΙΣΤΟΡΙΚΑ,ΑΥΓΗ,ΤΑ ΝΕΑ,ΕΘΝΟΣ,ΣΟΣΙΑΛΙΣΜΟΣ,LEFT,ΕΦΗΜΕΡΙΔΑ,ΚΟΚΚΙΝΟ,ATHENS VOICE,ΧΡΗΜΑ,ΟΙΚΟΝΟΜΙΑ,ΕΝΕΡΓΕΙΑ, ΡΑΤΣΙΣΜΟΣ,ΠΡΟΣΦΥΓΕΣ,GREECE,ΚΟΣΜΟΣ,ΜΑΓΕΙΡΙΚΗ,ΣΥΝΤΑΓΕΣ,ΕΛΛΗΝΙΣΜΟΣ,ΕΛΛΑΔΑ, ΕΜΦΥΛΙΟΣ,ΤΗΛΕΟΡΑΣΗ,ΕΓΚΥΚΛΙΟΣ,ΡΑΔΙΟΦΩΝΟ,ΓΥΜΝΑΣΤΙΚΗ,ΑΓΡΟΤΙΚΗ,ΟΛΥΜΠΙΑΚΟΣ, ΜΥΤΙΛΗΝΗ,ΧΙΟΣ,ΣΑΜΟΣ,ΠΑΤΡΙΔΑ,ΒΙΒΛΙΟ,ΕΡΕΥΝΑ,ΠΟΛΙΤΙΚΗ,ΚΥΝΗΓΕΤΙΚΑ,ΚΥΝΗΓΙ,ΘΡΙΛΕΡ, ΠΕΡΙΟΔΙΚΟ,ΤΕΥΧΟΣ,ΜΥΘΙΣΤΟΡΗΜΑ,ΑΔΩΝΙΣ ΓΕΩΡΓΙΑΔΗΣ,GEORGIADIS,ΦΑΝΤΑΣΤΙΚΕΣ ΙΣΤΟΡΙΕΣ, ΑΣΤΥΝΟΜΙΚΑ,ΦΙΛΟΣΟΦΙΚΗ,ΦΙΛΟΣΟΦΙΚΑ,ΙΚΕΑ,ΜΑΚΕΔΟΝΙΑ,ΑΤΤΙΚΗ,ΘΡΑΚΗ,ΘΕΣΣΑΛΟΝΙΚΗ,ΠΑΤΡΑ, ΙΟΝΙΟ,ΚΕΡΚΥΡΑ,ΚΩΣ,ΡΟΔΟΣ,ΚΑΒΑΛΑ,ΜΟΔΑ,ΔΡΑΜΑ,ΣΕΡΡΕΣ,ΕΥΡΥΤΑΝΙΑ,ΠΑΡΓΑ,ΚΕΦΑΛΟΝΙΑ, ΙΩΑΝΝΙΝΑ,ΛΕΥΚΑΔΑ,ΣΠΑΡΤΗ,ΠΑΞΟΙ
MACEDONIA is GREECE and will always be GREECE- (if they are desperate to steal a name, Monkeydonkeys suits them just fine)
ΚΑΤΩ Η ΣΥΓΚΥΒΕΡΝΗΣΗ ΤΩΝ ΠΡΟΔΟΤΩΝ!!!
ΦΕΚ,ΚΚΕ,ΚΝΕ,ΚΟΜΜΟΥΝΙΣΜΟΣ,ΣΥΡΙΖΑ,ΠΑΣΟΚ,ΝΕΑ ΔΗΜΟΚΡΑΤΙΑ,ΕΓΚΛΗΜΑΤΑ,ΔΑΠ-ΝΔΦΚ, MACEDONIA,ΣΥΜΜΟΡΙΤΟΠΟΛΕΜΟΣ,ΠΡΟΣΦΟΡΕΣ,ΥΠΟΥΡΓΕΙΟ,ΕΝΟΠΛΕΣ ΔΥΝΑΜΕΙΣ,ΣΤΡΑΤΟΣ, ΑΕΡΟΠΟΡΙΑ,ΑΣΤΥΝΟΜΙΑ,ΔΗΜΑΡΧΕΙΟ,ΝΟΜΑΡΧΙΑ,ΠΑΝΕΠΙΣΤΗΜΙΟ,ΛΟΓΟΤΕΧΝΙΑ,ΔΗΜΟΣ,LIFO,ΛΑΡΙΣΑ, ΠΕΡΙΦΕΡΕΙΑ,ΕΚΚΛΗΣΙΑ,ΟΝΝΕΔ,ΜΟΝΗ,ΠΑΤΡΙΑΡΧΕΙΟ,ΜΕΣΗ ΕΚΠΑΙΔΕΥΣΗ,ΙΑΤΡΙΚΗ,ΟΛΜΕ,ΑΕΚ,ΠΑΟΚ,ΦΙΛΟΛΟΓΙΚΑ,ΝΟΜΟΘΕΣΙΑ,ΔΙΚΗΓΟΡΙΚΟΣ,ΕΠΙΠΛΟ, ΣΥΜΒΟΛΑΙΟΓΡΑΦΙΚΟΣ,ΕΛΛΗΝΙΚΑ,ΜΑΘΗΜΑΤΙΚΑ,ΝΕΟΛΑΙΑ,ΟΙΚΟΝΟΜΙΚΑ,ΙΣΤΟΡΙΑ,ΙΣΤΟΡΙΚΑ,ΑΥΓΗ,ΤΑ ΝΕΑ,ΕΘΝΟΣ,ΣΟΣΙΑΛΙΣΜΟΣ,LEFT,ΕΦΗΜΕΡΙΔΑ,ΚΟΚΚΙΝΟ,ATHENS VOICE,ΧΡΗΜΑ,ΟΙΚΟΝΟΜΙΑ,ΕΝΕΡΓΕΙΑ, ΡΑΤΣΙΣΜΟΣ,ΠΡΟΣΦΥΓΕΣ,GREECE,ΚΟΣΜΟΣ,ΜΑΓΕΙΡΙΚΗ,ΣΥΝΤΑΓΕΣ,ΕΛΛΗΝΙΣΜΟΣ,ΕΛΛΑΔΑ, ΕΜΦΥΛΙΟΣ,ΤΗΛΕΟΡΑΣΗ,ΕΓΚΥΚΛΙΟΣ,ΡΑΔΙΟΦΩΝΟ,ΓΥΜΝΑΣΤΙΚΗ,ΑΓΡΟΤΙΚΗ,ΟΛΥΜΠΙΑΚΟΣ, ΜΥΤΙΛΗΝΗ,ΧΙΟΣ,ΣΑΜΟΣ,ΠΑΤΡΙΔΑ,ΒΙΒΛΙΟ,ΕΡΕΥΝΑ,ΠΟΛΙΤΙΚΗ,ΚΥΝΗΓΕΤΙΚΑ,ΚΥΝΗΓΙ,ΘΡΙΛΕΡ, ΠΕΡΙΟΔΙΚΟ,ΤΕΥΧΟΣ,ΜΥΘΙΣΤΟΡΗΜΑ,ΑΔΩΝΙΣ ΓΕΩΡΓΙΑΔΗΣ,GEORGIADIS,ΦΑΝΤΑΣΤΙΚΕΣ ΙΣΤΟΡΙΕΣ, ΑΣΤΥΝΟΜΙΚΑ,ΦΙΛΟΣΟΦΙΚΗ,ΦΙΛΟΣΟΦΙΚΑ,ΙΚΕΑ,ΜΑΚΕΔΟΝΙΑ,ΑΤΤΙΚΗ,ΘΡΑΚΗ,ΘΕΣΣΑΛΟΝΙΚΗ,ΠΑΤΡΑ, ΙΟΝΙΟ,ΚΕΡΚΥΡΑ,ΚΩΣ,ΡΟΔΟΣ,ΚΑΒΑΛΑ,ΜΟΔΑ,ΔΡΑΜΑ,ΣΕΡΡΕΣ,ΕΥΡΥΤΑΝΙΑ,ΠΑΡΓΑ,ΚΕΦΑΛΟΝΙΑ, ΙΩΑΝΝΙΝΑ,ΛΕΥΚΑΔΑ,ΣΠΑΡΤΗ,ΠΑΞΟΙ
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a<br />
MEASUREMENT OF A CIRCLE 55<br />
be<br />
The series <strong>of</strong> values found <strong>by</strong> Archimedes are shown in the<br />
following table<br />
> 2339J 1007 (< \/(1007 2 + 66 2 ) 66<br />
n a b c<br />
265 306 153 1351 1560 780<br />
571 > |V(571 2 +153 2 )]<br />
153 1 2911 < 591|<br />
< 3013JJ<br />
1162|>[V{(1162|) 2 +153 2 }] 153 2 f5924j|<br />
780]*<br />
>1172|<br />
1823 ( < v / (1823 2 +240 2 ) 240/<br />
1<br />
9<br />
< 1838 TT<br />
2334i>[v / {(2334£) 2 +153 2 }] 153 3 3661 T 9 T ... 240 f<br />
4673| 153 4<br />
2016|<br />
( < 1009J<br />
< V{(2016^) 2 + 66 2 } 66<br />
< 2017f<br />
and, bearing in mind that in the first case the final ratio<br />
a :<br />
4<br />
c is the ratio A : AG = 2 OA : OH, and in the second case<br />
the final ratio 6 4<br />
: c is the ratio AB : BG, while GH in the first<br />
figure and BG in the second are the sides <strong>of</strong> regular polygons<br />
<strong>of</strong> 96 sides circumscribed and inscribed respectively, we have<br />
finally<br />
96X153 96x66<br />
> 7T ><br />
4673| 2017J<br />
Archimedes simply infers <strong>from</strong> this that<br />
As a matter <strong>of</strong> fact<br />
3i >tt > 3if<br />
96 x 153 667| 667<br />
= 3 * _ i<br />
and<br />
"<br />
4673J 4673|'<br />
4672J<br />
1<br />
It is also <strong>to</strong> be observed that 3^£ = 3 -\ -, and it may<br />
have been arrived at <strong>by</strong> a method equivalent <strong>to</strong> developing<br />
the 6336<br />
fraction in the form <strong>of</strong> a continued fraction.<br />
2017j<br />
It should be noted that, in the text as we have it, the values<br />
<strong>of</strong> b lf b 2<br />
, 63, 6 4<br />
are simply stated in their final form without<br />
the intermediate step containing the radical except in the first<br />
* t Here the ratios <strong>of</strong> a <strong>to</strong> c are in the first instance reduced <strong>to</strong> lower<br />
terms.<br />
56 ARCHIMEDES<br />
case <strong>of</strong> all, where we are <strong>to</strong>ld that 0D l :AD 2 > 349450 :<br />
and then that OD.DA > 591j:153. At the points marked<br />
* and f in the table Archimedes simplifies the ratio a :<br />
2<br />
c and<br />
a :<br />
z<br />
c before calculating b 2<br />
, b z<br />
respectively, <strong>by</strong> multiplying each<br />
term in the first case <strong>by</strong> 5 % and in the second case <strong>by</strong> JJ.<br />
He gives no explanation <strong>of</strong> the exact figure taken as the<br />
approximation <strong>to</strong> the square root in each case, or <strong>of</strong> the<br />
method <strong>by</strong> which he obtained it. We may, however, be sure<br />
23409<br />
that the method amounted <strong>to</strong> the use <strong>of</strong> the formula (a±b) 2<br />
= a 2 + 2 ab + b 2 , much as our method <strong>of</strong> extracting the square<br />
root also depends upon it.<br />
We have already seen (vol. i, p. 232) that, according <strong>to</strong><br />
Heron, Archimedes made a still closer approximation <strong>to</strong> the<br />
value <strong>of</strong> 77.<br />
On Conoids and Spheroids.<br />
The main problems attacked in this treatise are, in Archimedes's<br />
manner, stated in his preface addressed <strong>to</strong> Dositheus,<br />
which also sets out the premisses with regard <strong>to</strong> the solid<br />
figures in question. These premisses consist <strong>of</strong> definitions and<br />
obvious inferences <strong>from</strong> them. The figures are (1) the rightangled<br />
conoid (paraboloid <strong>of</strong> revolution), (2) the obtuse-angled<br />
conoid (hyperboloid <strong>of</strong> revolution), and (3) the spheroids<br />
(a) the oblong, described <strong>by</strong> the revolution <strong>of</strong> an ellipse about<br />
its 'greater diameter' (major axis), (b) the flat, described <strong>by</strong><br />
the revolution <strong>of</strong> an ellipse about its lesser diameter ' ' (minor<br />
axis). Other definitions are those <strong>of</strong> the vertex and axis <strong>of</strong> the<br />
figures or segments there<strong>of</strong>, the vertex <strong>of</strong> a segment being<br />
the point <strong>of</strong> contact <strong>of</strong> the tangent plane <strong>to</strong> the solid which<br />
is parallel <strong>to</strong> the base <strong>of</strong> the segment. The centre is only<br />
recognized in the case <strong>of</strong> the spheroid ; what corresponds <strong>to</strong><br />
the centre in the case <strong>of</strong> the hyperboloid is the ' vertex <strong>of</strong><br />
the enveloping cone ' (described <strong>by</strong> the revolution <strong>of</strong> what<br />
Archimedes calls the 'nearest lines <strong>to</strong> the section <strong>of</strong> the<br />
obtuse-angled cone', i.e. the asymp<strong>to</strong>tes <strong>of</strong> the hyperbola),<br />
and the line between this point and the vertex <strong>of</strong> the hyperboloid<br />
or segment is<br />
called, not the axis or diameter, but (the<br />
line) 'adjacent <strong>to</strong> the axis'. The axis <strong>of</strong> the segment is in<br />
the case <strong>of</strong> the paraboloid the line through the vertex <strong>of</strong> the<br />
segment parallel <strong>to</strong> the axis <strong>of</strong> the paraboloid, in the case