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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THE QUADRATURE OF THE PARABOLA 91<br />
the triangle PQq is half <strong>of</strong> the parallelogram and therefore<br />
more than half the segment. And so on (Prop. 20).<br />
We now have <strong>to</strong> sum n terms <strong>of</strong> the above geometrical<br />
series. Archimedes enunciates the problem in the form, Given<br />
a series <strong>of</strong> areas A, B, C, D . . . Z, <strong>of</strong> which A is the greatest, and<br />
each is equal <strong>to</strong> four times the next in order, then (Prop. 23)<br />
A+B + C+... + Z+iZ = §A.<br />
The algebraical equivalent <strong>of</strong> this is <strong>of</strong> course<br />
i+H(i) 2 +...+(ir l =f-iar i =<br />
:!f<br />
1^-<br />
To find the area <strong>of</strong> the segment, Archimedes, instead <strong>of</strong><br />
taking the limit, as we should, uses the method <strong>of</strong> reductio ad<br />
absurdum.<br />
Suppose K — f<br />
. A<br />
PQq.<br />
(1) If possible, let the area <strong>of</strong> the segment be greater than K. ,<br />
We then inscribe a figure in the recognized manner ' ' such<br />
that the segment exceeds it <strong>by</strong> an area less than the excess <strong>of</strong><br />
the segment over K. Therefore the inscribed figure must be<br />
greater than K, which is impossible since<br />
A + B + C+...+Z< §4,<br />
where A = APQq (Prop. 23).<br />
(2)<br />
If<br />
If possible, let the area <strong>of</strong> the segment be less than K.<br />
then APQq = A, B = \A, G = \B, and so on, until we<br />
arrive at an area X less than the excess <strong>of</strong> K over the area <strong>of</strong><br />
the segment, we have<br />
A + B + C+ ... +X + iX = %A = K.<br />
Thus K exceeds A + B + C+ ... + X <strong>by</strong> an area less than X,<br />
and exceeds the segment <strong>by</strong> an area greater than X.<br />
It follows that A +B + C+ ... +X> (the segment) ; which<br />
is impossible (Prop. 22).<br />
Therefore the area <strong>of</strong> the segment, being neither greater nor<br />
less than K, is equal <strong>to</strong> K or f APQq.<br />
On Floating Bodies, I, <strong>II</strong>.<br />
In Book I <strong>of</strong> this treatise Archimedes lays down the fundamental<br />
principles <strong>of</strong> the science <strong>of</strong> hydrostatics. These are<br />
1<br />
4<br />
92 ARCHIMEDES<br />
deduced <strong>from</strong> Postulates which are only two in number.<br />
first which begins Book I is this<br />
1<br />
The<br />
let it be assumed that a fluid is <strong>of</strong> such a nature that, <strong>of</strong> the<br />
parts <strong>of</strong> it which lie evenly and are continuous, that which is<br />
pressed the less is driven along <strong>by</strong> that which is pressed the<br />
more ; and each <strong>of</strong> its parts is pressed <strong>by</strong> the fluid which is<br />
perpendicularly above it except when the fluid is shut up in<br />
anything and pressed <strong>by</strong> something else '<br />
the second, placed after Prop. 7, says<br />
'<br />
let it be assumed that, <strong>of</strong> bodies which are borne upwards in<br />
a fluid, each is borne upwards along the perpendicular drawn<br />
through its centre <strong>of</strong> gravity \<br />
Prop. 1 is a preliminary proposition about a sphere, and<br />
then Archimedes plunges in medias res with the theorem<br />
(Prop. 2) that ' the surface <strong>of</strong> any fluid at rest is a sphere the<br />
centre <strong>of</strong> which is the same as that <strong>of</strong> the earth ', and in the<br />
whole <strong>of</strong> Book I the surface <strong>of</strong> the fluid is always shown in<br />
the diagrams as spherical. The method <strong>of</strong> pro<strong>of</strong> is similar <strong>to</strong><br />
what we should expect in a modern elementary textbook, the<br />
main propositions established being the following. A solid<br />
which, size for size, is <strong>of</strong> equal weight with a fluid will, if let<br />
down in<strong>to</strong> the fluid, sink till it is just covered but not lower<br />
(Prop. 3)<br />
; a solid lighter than a fluid will, if let down in<strong>to</strong> it,<br />
be only partly immersed, in fact just so far that the weight<br />
<strong>of</strong> the solid is equal <strong>to</strong> the weight <strong>of</strong> the fluid displaced<br />
(Props. 4, 5), and, if it is forcibly immersed, it will be driven<br />
upwards <strong>by</strong> a force equal <strong>to</strong> the difference between its weight<br />
and the weight <strong>of</strong> the fluid displaced (Prop. 6).<br />
The important proposition follows (Prop. 7) that a solid<br />
heavier than a fluid will, if placed in it, sink <strong>to</strong> the bot<strong>to</strong>m <strong>of</strong><br />
the fluid, and the solid will, when weighed in the fluid, be<br />
lighter than its true weight <strong>by</strong> the weight <strong>of</strong> the fluid<br />
displaced.<br />
The problem <strong>of</strong> the<br />
Crown.<br />
This proposition gives a method <strong>of</strong> solving the famous<br />
problem the discovery <strong>of</strong> which in his bath sent Archimedes<br />
home naked crying tvprjKa, evprjKa, namely the problem <strong>of</strong>