История математики
History of math. The most ancient mathematical activity was counting. The
counting was necessary to keep up a livestock of cattle and to do business.
Some primitive tribes counted up amount of subjects, comparing them various
parts of a body, mainly fingers of hands and foots. Some pictures on the
stone represents number 35 as a series of 35 sticks  fingers built in a
line. The first essential success in arithmetic was the invention of four
basic actions: additions, subtraction, multiplication and division. The
first achievements of geometry are connected to such simple concepts, as a
straight line and a circle. The further development of mathematics began
approximately in 3000 up to AD due to Babylonians and Egyptians.
BABYLONIA AND EGYPT
Babylonia. The source of our knowledge about the Babylon civilization are
well saved clay tablets covered with texts which are dated from 2000 AD and
up to 300 AD . The mathematics on tablets basically has been connected to
housekeeping. Arithmetic and simple algebra were used at an exchange of
money and calculations for the goods, calculation of simple and complex
percent, taxes and the share of a crop which are handed over for the
benefit of the state, a temple or the land owner. Numerous arithmetic and
geometrical problems arose in connection with construction of channels,
granaries and other public jobs. Very important problem of mathematics was
calculation of a calendar. A calendar was used to know the terms of
agricultural jobs and religious holidays. Division of a circle on 360 and
degree and minutes on 60 parts originates in the Babylon astronomy.
Babylonians have made tables of inverse numbers (which were used at
performance of division), tables of squares and square roots, and also
tables of cubes and cubic roots. They knew good approximation of a number
[pic]. The texts devoted to the solving algebraic and geometrical
problems, testify that they used the squarelaw formula for the solving
quadratics and could solve some special types of the problems, including up
to ten equations with ten unknown persons, and also separate versions of
the cubic equations and the equations of the fourth degree. On the clay
tablets problems and the basic steps of procedures of their decision are
embodied only. About 700 AD babylonians began to apply mathematics to
research of, motions of the Moon and planets. It has allowed them to
predict positions of planets that were important both for astrology, and
for astronomy.
In geometry babylonians knew about such parities, for example, as
proportionality of the corresponding parties of similar triangles,
Pythagoras’ theorem and that a corner entered in halfcircle was known for
a straight line. They had also rules of calculation of the areas of simple
flat figures, including correct polygons, and volumes of simple bodies.
Number [pic] babylonians equaled to 3.
Egypt. Our knowledge about ancient greek mathematics is based mainly on two
papyruses dated approximately 1700 AD. Mathematical data stated in these
papyruses go back to earlier period  around 3500 AD. Egyptians used
mathematics to calculate weight of bodies, the areas of crops and volumes
of granaries, the amount of taxes and the quantity of stones required to
build those or other constructions. In papyruses it is possible to find
also the problems connected to solving of amount of a grain, to set number
necessary to produce a beer, and also more the challenges connected to
distinction in grades of a grain; for these cases translation factors were
calculated.
But the main scope of mathematics was astronomy, the calculations connected
to a calendar are more exact. The calendar was used find out dates of
religious holidays and a prediction of annual floods of Nile. However the
level of development of astronomy in Ancient Egypt was much weaker than
development in Babylon.
Ancient greek writing was based on hieroglyphs. They used their alphabet. I
think it’s not efficient; It’s difficult to count using letters. Just think
how they could multiply such numbers as 146534 to 19870503 using alphabet.
May be they needn’t to count such numbers. Nevertheless they’ve built an
incredible things – pyramids. They had to count the quantity of the stones
that were used and these quantities sometimes reached to thousands of
stones. I imagine their papyruses like a paper with numbers ABC, that
equals, for example, to 3257.
The geometry at Egyptians was reduced to calculations of the areas of
rectangular, triangles, trapezes, a circle, and also formulas of
calculation of volumes of some bodies. It is necessary to say, that
mathematics which Egyptians used at construction of pyramids, was simple
and primitive. I suppose that simple and primitive geometry can not create
buildings that can stand for thousands of years but the author thinks
differently.
Problems and the solving resulted in papyruses, are formulated without any
explanations. Egyptians dealt only with the elementary types of quadratics
and arithmetic and geometrical progressions that is why also those common
rules which they could deduce, were also the most elementary kind. Neither
Babylon, nor Egyptian mathematics had no the common methods; the arch of
mathematical knowledge represented a congestion of empirical formulas and
rules.
THE GREEK MATHEMATICS
Classical Greece. From the point of view of 20 century ancestors of
mathematics were Greeks of the classical period (64 centuries AD). The
mathematics existing during earlier period, was a set of the empirical
conclusions. On the contrary, in a deductive reasoning the new statement is
deduced from the accepted parcels by the way excluding an opportunity of
its aversion.
Insisting of Greeks on the deductive proof was extraordinary step. Any
other civilization has not reached idea of reception of the conclusions
extremely on the basis of the deductive reasoning which is starting with
obviously formulated axioms. The reason is a greek society of the classical
period. Mathematics and philosophers (quite often it there were same
persons) belonged to the supreme layers of a society where any practical
activities were considered as unworthy employment. Mathematics preferred
abstract reasoning on numbers and spatial attitudes to the solving of
practical problems. The mathematics consisted of a arithmetic  theoretical
aspect and logistic  computing aspect. The lowest layers were engaged in
logistic.
Deductive character of the Greek mathematics was completely generated by
Plato’s and Eratosthenes’ time. Other great Greek, with whose name connect
development of mathematics, was Pythagoras. He could meet the Babylon and
Egyptian mathematics during the long wanderings. Pythagoras has based
movement which blossoming falls at the period around 550300 AD.
Pythagoreans have created pure mathematics in the form of the theory of
numbers and geometry. They represented integers as configurations from
points or a little stones, classifying these numbers according to the form
of arising figures (« figured numbers »). The word "accounting" (counting,
calculation) originates from the Greek word meaning "a little stone".
Numbers 3, 6, 10, etc. Pythagoreans named triangular as the corresponding
number of the stones can be arranged as a triangle, numbers 4, 9, 16, etc.
 square as the corresponding number of the stones can be arranged as a
square, etc.
From simple geometrical configurations there were some properties of
integers. For example, Pythagoreans have found out, that the sum of two
consecutive triangular numbers is always equal to some square number. They
have opened, that if (in modern designations) n[pic]  square number,
n[pic] + 2n +1 = (n + 1)[pic]. The number equal to the sum of all own
dividers, except for most this number, Pythagoreans named accomplished. As
examples of the perfect numbers such integers, as 6, 28 and 496 can serve.
Two numbers Pythagoreans named friendly, if each of numbers equally to the
sum of dividers of another; for example, 220 and 284  friendly numbers
(here again the number is excluded from own dividers).
For Pythagoreans any number represented something the greater, than
quantitative value. For example, number 2 according to their view meant
distinction and consequently was identified with opinion. The 4 represented
validity, as this first equal to product of two identical multipliers.
Pythagoreans also have opened, that the sum of some pairs of square numbers
is again square number. For example, the sum 9 and 16 is equal 25, and the
sum 25 and 144 is equal 169. Such three of numbers as 3, 4 and 5 or 5, 12
and 13, are called “Pythagorean” numbers. They have geometrical
interpretation: if two numbers from three to equate to lengths of
cathetuses of a rectangular triangle the third will be equal to length of
its hypotenuse. Such interpretation, apparently, has led Pythagoreans to
comprehension more common fact known nowadays under the name of a
pythagoras’ theorem, according to which the square of length of a
hypotenuse is equal the sum of squares of lengths of cathetuses.
Considering a rectangular triangle with cathetuses equaled to 1,
Pythagoreans have found out, that the length of its hypotenuse is equal to
[pic], and it made them confusion because they tried to present number
[pic]as the division of two integers that was extremely important for their
philosophy. Values, not representable as the division of integers,
Pythagoreans have named incommensurable; the modern term  « irrational
numbers ». About 300 AD Euclid has proved, that the number [pic]is
incommensurable. Pythagoreans dealt with irrational numbers, representing
all sizes in the geometrical images. If 1 and [pic]to count lengths of some
pieces distinction between rational and irrational numbers smoothes out.
Product of numbers [pic]also [pic]is the area of a rectangular with the
sides in length [pic]and [pic].Today sometimes we speak about number 25 as
about a square of 5, and about number 27  as about a cube of 3.
Ancient Greeks solved the equations with unknown values by means of
geometrical constructions. Special constructions for performance of
addition, subtraction, multiplication and division of pieces, extraction of
square roots from lengths of pieces have been developed; nowadays this
method is called as geometrical algebra.
Reduction of problems to a geometrical kind had a number of the important
consequences. In particular, numbers began to be considered separately from
geometry because to work with incommensurable divisions it was possible
only with the help of geometrical methods. The geometry became a basis
almost all strict mathematics at least to 1600 AD. And even in 18[pic]
century when the algebra and the mathematical analysis have already been
advanced enough, the strict mathematics was treated as geometry, and the
word "geometer" was equivalent to a word "mathematician".
One of the most outstanding Pythagoreans was Plato. Plato has been
convinced, that the physical world is conceivable only by means of
mathematics. It is considered, that exactly to him belongs a merit of the
invention of an analytical method of the proof. (the Analytical method
begins with the statement which it is required to prove, and then from it
consequences, which are consistently deduced until any known fact will be
achieved; the proof turns out with the help of return procedure.) It is
considered to be, that Plato’s followers have invented the method of the
proof which have received the name "rule of contraries". The appreciable
place in a history of mathematics is occupied by Aristotle; he was the
Plato’s learner. Aristotle has put in pawn bases of a science of logic and
has stated a number of ideas concerning definitions, axioms, infinity and
opportunities of geometrical constructions.
About 300 AD results of many Greek mathematicians have been shown in the
one work by Euclid, who had written a mathematical masterpiece “the
Beginning”. From few selected axioms Euclid has deduced about 500 theorems
which have captured all most important results of the classical period.
Euclid’s Composition was begun from definition of such terms, as a straight
line, with a corner and a circle. Then he has formulated ten axiomatic
trues, such, as « the integer more than any of parts ». And from these ten
axioms Euclid managed to deduce all theorems.
Apollonius lived during the Alexandria period, but his basic work is
sustained in spirit of classical traditions. The analysis of conic sections
suggested by him  circles, an ellipse, a parabola and a hyperbole  was
the culmination of development of the Greek geometry. Apollonius also
became the founder of quantitative mathematical astronomy.
The Alexandria period. During this period which began about 300 AD, the
character of a Greek mathematics has changed. The Alexandria mathematics
has arisen as a result of merge of classical Greek mathematics to
mathematics of Babylonia and Egypt. Generally the mathematics of the
Alexandria period were more inclined to the solving technical problems,
than to philosophy. Great Alexandria mathematics  Eratosthenes, Archimedes
and Ptolemaist  have shown force of the Greek genius in theoretical
abstraction, but also willingly applied the talent for the solving of
practical problems and only quantitative problems.
Eratosthenes has found a simple method of exact calculation of length of a
circle of the Earth, he possesses a calendar in which each fourth year has
for one day more, than others. The astronomer the Aristarch has written the
composition “About the sizes and distances of the Sun and the Moon”,
containing one of the first attempts of definition of these sizes and
distances; the character of the Aristarch’s job was geometrical.
The greatest mathematician of an antiquity was Archimedes. He possesses
formulations of many theorems of the areas and volumes of complex figures
and the bodies. Archimedes always aspired to receive exact decisions and
found the top and bottom estimations for irrational numbers. For example,
working with a correct 96square, he has irreproachably proved, that exact
value of number [pic] is between 3[pic] and 3[pic]. Архимед has proved also
some theorems, containing new results of geometrical algebra.
Archimedes also was the greatest mathematical physicist of an antiquity.
For the proof of theorems of mechanics he used geometrical reasons. His
composition “About floating bodies” has put in pawn bases of a
hydrostatics.
Decline of Greece. After a gain of Egypt Romans in 31 AD great Greek
Alexandria civilization has come to decline. Cicerones with pride approved,
that as against Greeks Romans not dreamers that is why put the mathematical
knowledge into practice, taking from them real advantage. However in
development of the mathematics the contribution of roman was insignificant.
INDIA AND ARABS
Successors of Greeks in a history of mathematics were Indians. Indian
mathematics were not engaged in proofs, but they have entered original
concepts and a number of effective methods. They have entered zero as
cardinal number and as a symbol of absence of units in the corresponding
category. Moravia (850 AD) has established rules of operations with zero,
believing, however, that division of number into zero leaves number
constant. The right answer for a case of division of number on zero has
been given by Bharskar (born In 1114 AD ?), he possesses rules of actions
above irrational numbers. Indians have entered concept of negative numbers
(for a designation of duties). We find their earliest use at Brahmagupta’s
(around 630). Ariabhata (born in 476 AD?) has gone further in use of
continuous fractions at the decision of the uncertain equations.
Our modern notation based on an item principle of record of numbers and
zero as cardinal number and use of a designation of the empty category, is
called IndoArabian. On a wall of the temple constructed in India around
250 AD, some figures, reminding on the outlines our modern figures are
revealed.
About 800 Indian mathematics has achieved Baghdad. The term "algebra"
occurs from the beginning of the name of book AlJebr vahlmukabala
Completion and opposition (Альджебр валмукабала), written in 830
astronomer and the mathematician AlHorezmi. In the composition he did
justice to merits of the Indian mathematics. The algebra of AlHorezmi has
been based on works of Brahmagupta, but in that work Babylon and Greek math
influences are clearly distinct. Other outstanding Arabian mathematician
Ibn AlHaisam (around 9651039) has developed a way of reception of
algebraic solvings of the square and cubic equations. Arabian mathematics,
among them and Omar Khayyam, were able to solve some cubic equations with
the help of geometrical methods, using conic sections. The Arabian
astronomers have entered into trigonometry concept of a tangent and
cotangent. Nasyreddin Tusy (12011274 AD) in the “Treatise about a full
quadrangle” has regularly stated flat and spherical to geometry and the
first has considered trigonometry separately from astronomy.
And still the most important contribution of arabs to mathematics of steel
their translations and comments to great creations of Greeks. Europe has
met these jobs after a gain arabs of Northern Africa and Spain, and later
works of Greeks have been translated to Latin.
MIDDLE AGES AND REVIVAL
Medieval Europe. The Roman civilization has not left an appreciable trace
in mathematics as was too involved in the solving of practical problems. A
civilization developed in Europe of the early Middle Ages (around 4001100
AD), was not productive for the opposite reason: the intellectual life has
concentrated almost exclusively on theology and future life. The level of
mathematical knowledge did not rise above arithmetics and simple sections
from Euclid’s “Beginnings”. In Middle Ages the astrology was considered as
the most important section of mathematics; astrologists named
mathematicians.
About 1100 in the WestEuropean mathematics began almost threecentury
period of development saved by arabs and the Byzantian Greeks of a heritage
of the Ancient world and the East. Europe has received the extensive
mathematical literature because of arabs owned almost all works of ancient
Greeks. Translation of these works into Latin promoted rise of mathematical
researches. All great scientists of that time recognized, that scooped
inspiration in works of Greeks.
The first European mathematician deserving a mention became Leonardo
Byzantian (Fibonacci). In the composition “the Book Abaca” (1202) he has
acquainted Europeans with the IndоArabian figures and methods of
calculations and also with the Arabian algebra. Within the next several
centuries mathematical activity in Europe came down.
Revival. Among the best geometers of Renaissance there were the artists
developed idea of prospect which demanded geometry with converging parallel
straight lines. The artist Leon Batista Alberty (14041472) has entered
concepts of a projection and section. Rectilinear rays of light from an eye
of the observer to various points of a represented stage form a projection;
the section turns out at passage of a plane through a projection. That the
drawn picture looked realistic, it should be such section. Concepts of a
projection and section generated only mathematical questions. For example,
what general geometrical properties the section and an initial stage, what
properties of two various sections of the same projection, formed possess
two various planes crossing a projection under various corners? From such
questions also there was a projective geometry. Its founder  Z. Dezarg
(15931662 AD) with the help of the proofs based on a projection and
section, unified the approach to various types of conic sections which
great Greek geometer Apollonius considered separately.
I think that mathematics developed by attempts and mistakes. There is no
perfect science today. Also math has own mistakes, but it aspires to be
more accurate. A development of math goes thru a development of the
society. Starting from counting on fingers, finishing on solving difficult
problems, mathematics prolong it way of development. I suppose that it’s no
people who can say what will be in 100200 or 500 years. But everybody
knows that math will get new level, higher one. It will be new hightech
level and new methods of solving today’s problems. May in the future some
man will find mistakes in our thinking, but I think it’s good, it’s good
that math will not stop.
Bibliography:
ВандерВарден Б.Л. «Пробуждающаяся наука». Математика древнего Египта,
Вавилона и Греции. МОСКВА, 1959
Юшкевич A.П. История математики в средние века. МОСКВА, 1961
ДаанДальмедико А., Пейффер Ж. Пути и лабиринтыю Очерки по истории
математики МОСКВА, 1986
Клейн Ф. Лекции о развитии математики в XIX столетии. МОСКВА, 1989
