Euclid was a Greek mathematician from Alexandria who is considered the most influential mathematician of ancient times. He wrote Elements, one of the most influential works in mathematics, which was used as a textbook for over 2000 years. He proved many important theorems in number theory and geometry. Archimedes was a Greek mathematician considered the greatest of ancient times. He made important advances in geometry, number theory, algebra, and analysis. He anticipated integral calculus and determined formulas for volumes and areas of spheres. Ramanujan was an Indian mathematician who made extensive contributions to mathematical analysis, number theory, infinite series, and continued fractions despite having no formal training in pure mathematics. He produced over 3000 results, conjectures, and theorems and

1. About mathematiciansAbout mathematicians

2. EUCLIDEUCLID

3. Euclid may have been a student of Aristotle. He founded the school of
mathematics at the great university of Alexandria. He was the first to prove that
there are infinitely many prime numbers; he stated and proved the Unique
Factorization Theorem; and he devised Euclid's algorithm for computing gcd. He
introduced the Mersenne primes and observed that (M2+M)/2 is always perfect
(in the sense of Pythagoras) if M is Mersenne. (The converse, that any even
perfect number has such a corresponding Mersenne prime, was tackled by
Alhazen and proven by Euler.) He proved that there are only five "Platonic
solids," as well as theorems of geometry far too numerous to summarize; among
many with special historical interest is the proof that rigid-compass constructions
can be implemented with collapsing-compass constructions. Although notions of
trigonometry were not in use, Euclid's theorems include some closely related to
the Laws of Sines and Cosines. Among several books attributed to Euclid are The
Division of the Scale (a mathematical discussion of music), The Optics, The
Cartoptrics (a treatise on the theory of mirrors), a book on spherical geometry, a
book on logic fallacies, and his comprehensive math textbook The Elements.
Several of his masterpieces have been lost, including works on conic sections and
other advanced geometric topics. Apparently Desargues' Homology Theorem (a
pair of triangles is coaxial if and only if it is copolar) was proved in one of these
lost works; this is the fundamental theorem which initiated the study of projective
geometry

4.  Euclid ranks #14 on Michael Hart's famous list of theEuclid ranks #14 on Michael Hart's famous list of the
Most Influential Persons in History.Most Influential Persons in History. The ElementsThe Elements
introduced the notions of axiom and theorem; was used as aintroduced the notions of axiom and theorem; was used as a
textbook for 2000 years; and in fact is still the basis fortextbook for 2000 years; and in fact is still the basis for
high school geometry, making Euclid the leadinghigh school geometry, making Euclid the leading
mathematics teacher of all time. Some think his bestmathematics teacher of all time. Some think his best
inspiration was recognizing that the Parallel Postulateinspiration was recognizing that the Parallel Postulate
must be an axiom rather than a theorem. There are manymust be an axiom rather than a theorem. There are many
famous quotations about Euclid and his books. Abrahamfamous quotations about Euclid and his books. Abraham
Lincoln abandoned his law studies when he didn't knowLincoln abandoned his law studies when he didn't know
what "demonstrate" meant and "went home to my father'swhat "demonstrate" meant and "went home to my father's
house [to read Euclid], and stayed there till I could givehouse [to read Euclid], and stayed there till I could give
any proposition in the six books of Euclid at sight. I thenany proposition in the six books of Euclid at sight. I then
found out what demonstrate means, and went back to myfound out what demonstrate means, and went back to my
law studies."law studies."

6. Indian mathematicians excelled for thousands of
years, and eventually even developed advanced
techniques like Taylor series before Europeans did,
but they are denied credit because of Western
ascendancy. Among the Hindu mathematicians,
Aryabhatta (called Arjehir by Arabs) may be most
famous.
While Europe was in its early "Dark Age," Aryabhatta
advanced arithmetic, algebra, elementary analysis,
and especially trigonometry, using the decimal system.
Aryabhatta is sometimes called the "Father of Algebra"
instead of al-Khowârizmi (who himself cites the work
of Aryabhatta). His most famous accomplishment in
mathematics was the Aryabhatta Algorithm (connected
to continued fractions) for solving Diophantine
equations.

7. Aryabhatta made several important discoveries in
astronomy; for example, his estimate of the Earth's
circumference was more accurate than any achieved in
ancient Greece. He was among the ancient scholars who
realized the Earth rotated daily on an axis; claims that
he also espoused heliocentric orbits are controversial, but
may be confirmed by the writings of al-Biruni. Aryabhatta
is said to have introduced the constant e. He used π ≈
3.1416; it is unclear whether he discovered this
independently or borrowed it from Liu Hui of China.
Among theorems first discovered by Aryabhatta is the
famous identity
(k3) = ( k)2Σ Σ

9. Archimedes is universally acknowledged to be the greatest of
ancient mathematicians. He studied at Euclid's school (probably
after Euclid's death), but his work far surpassed the works of
Euclid. His achievements are particularly impressive given the
lack of good mathematical notation in his day. His proofs are
noted not only for brilliance but for unequalled clarity, with a
modern biographer (Heath) describing Archimedes' treatises as
"without exception monuments of mathematical exposition ... so
impressive in their perfection as to create a feeling akin to awe
in the mind of the reader." Archimedes made advances in
number theory, algebra, and analysis, but is most renowned for
his many theorems of plane and solid geometry

10. He was first to prove Heron's formula for the area of a
triangle. His excellent approximation to √3 indicates that he'd
partially anticipated the method of continued fractions. He found
a method to trisect an arbitrary angle (using a markable
straightedge — the construction is impossible using strictly
Platonic rules). One of his most remarkable and famous
geometric results was determining the area of a parabolic
section, for which he offered two independent proofs, one using
his Principle of the Lever, the other using a geometric series.
Many of Archimedes' discoveries are known only second-hand:
Pappus reports that he discovered the Archimedean solids;
Thabit bin Qurra reports his method to construct a regular
heptagon; Alberuni credits the Broken-Chord Theorem to him;
etc.

11. Archimedes anticipated integral calculus, most notably by
determining the centers of mass of hemisphere and
cylindrical wedge, and the volume of two cylinders'
intersection. Although Archimedes made little use of
differential calculus, Chasles credits him (along with
Kepler, Cavalieri, and Fermat) as one of the four who
developed calculus before Newton and Leibniz. He was
similar to Newton in that he used his (non-rigorous)
calculus to discover results, but then devised rigorous
geometric proofs for publication. His original achievements
in physics include the principles of leverage, the first law of
hydrostatics, and inventions like the compound pulley, the
hydraulic screw, and war machines. His books include
Floating Bodies, Spirals, The Sand Reckoner,
Measurement of the Circle, and Sphere and Cylinder.

12. He developed the Stomachion puzzle (and solved a difficult
enumeration problem involving it). Archimedes proved that the
volume of a sphere is two-thirds the volume of a circumscribing
cylinder. He requested that a representation of such a sphere and
cylinder be inscribed on his tomb.
Archimedes discovered formulae for the volume and surface area of
a sphere, and may even have been first to notice and prove the simple
relationship between a circle's circumference and area. For these
reasons, π is often called Archimedes' constant. His approximation
223/71 < π < 22/7 was the best of his day. (Apollonius soon
surpassed it, but by using Archimedes' method.) That Archimedes
shared the attitude of later mathematicians like Hardy and Brouwer
is suggested by Plutarch's comment that Archimedes regarded
applied mathematics "as ignoble and sordid ... and did not deign to
[write about his mechanical inventions; instead] he placed his whole
ambition in those speculations the beauty and subtlety of which are
untainted by any admixture of the common needs of life."

13. Some of Archimedes' greatest writings are
preserved on a palimpsest which has been
rediscovered and properly studied only since
1998. Ideas unique to that work are calculating
the volume of a cylindrical wedge (previously
first attributed to Kepler), and perhaps an
implication that Archimedes understood the
distinction between countable and uncountable
infinities (a distinction which wasn't resolved
until Georg Cantor, who lived 2300 years after
the time of Archimedes .

14. Some of Archimedes' greatest writings
are preserved on a palimpsest which has
been rediscovered and properly studied only
since 1998. Ideas unique to that work are
calculating the volume of a cylindrical
wedge (previously first attributed to
Kepler), and perhaps an implication that
Archimedes understood the distinction
between countable and uncountable
infinities (a distinction which wasn't
resolved until Georg Cantor, who lived
2300 years after the time of Archimedes

16. Like Abel, Ramanujan was a self-taught prodigy
who lived in a country distant from his mathematical
peers, and suffered from poverty: childhood dysentery
and vitamin deficiencies probably led to his early
death. Yet he produced 4000 theorems or conjectures
in number theory, algebra, and combinatorics. He
might be almost unknown today, except that his letter
caught the eye of Godfrey Hardy, who saw
remarkable, almost inexplicable formulae which
"must be true, because if they were not true, no one
would have had the imagination to invent them.

17. ." Ramanujan's specialties included infinite
series, elliptic functions, continued fractions,
partition enumeration, definite integrals,
modular equations, gamma functions, "mock
theta" functions, hypergeometric series, and
"highly composite" numbers. Much of his best
work was done in collaboration with Hardy, for
example a proof that almost all numbers n have
about log log n prime factors (a result which
developed into probabilistic number theory).
Much of his methodology, including unusual
ideas about divergent series, was his own
invention.

18. (As a young man he made the absurd claim
that 1+2+3+4+... = -1/12. Later it was
noticed that this claim translates to a true
statement about the Riemann zeta function,
with which Ramanujan was unfamiliar.)
Ramanujan's innate ability for algebraic
manipulations equaled or surpassed that of
Euler and Jacobi.
Ramanujan's most famous work was with
the partition enumeration function p(), Hardy
guessing that some of these discoveries would
have been delayed at least a century without
Ramanujan.

19. Together ,Hardy and Ramanujan
developed an analytic
approximation to p(). (Rademacher
and Selberg later discovered an
exact expression to replace the
Hardy-Ramanujan formula; when
Ramanujan's notebooks were
studied it was found he had
anticipated their technique, but had
deferred to his friend and mentor.)

20. Many of Ramanujan's other results would
also probably never have been discovered
without him, and are so inspirational that
there is a periodical dedicated to them. The
theories of strings and crystals have
benefited from Ramanujan's work. (Today
some professors achieve fame just by finding
a new proof for one of Ramanujan's many
results.) Unlike Abel, who insisted on
rigorous proofs, Ramanujan often omitted
proofs. (Ramanujan may have had
unrecorded proofs, poverty leading him to
use chalk and erasable slate rather than
paper.)

21. Unlike Abel, much of whose work depended on
the complex numbers, most of Ramanujan's
work focused on real numbers. Despite these
limitations, Ramanujan is considered one of the
greatest geniuses ever.
Because of its fast convergence, an odd-looking
formula of Ramanujan is sometimes used to
calculate π:
992 / π = √8 ∑k=0,∞ ((4k)!
(1103+26390 k) / (k!4 3964k))

23. NewtoN was aN iNdustrious lad who built
marvelous toys (e.g. a model wiNdmill powered
by a mouse oN treadmill). at about age 22, oN
leave from uNiversity, this geNius begaN
revolutioNary advaNces iN mathematics,
optics, dyNamics, thermodyNamics, acoustics
aNd celestial mechaNics. he is famous for his
three laws of motioN (iNertia, force,
reciprocal actioN) but, as NewtoN himself
ackNowledged, these laws wereN't fully
Novel: hipparchus, ibN al-haytham, galileo aNd
huygeNs had all developed much basic
mechaNics already, aNd NewtoN credits the
first law itself to aristotle.

24. however NewtoN was also appareNtly the
first persoN to coNclude that the ordiNary
gravity we observe oN earth is the very
same force that keeps the plaNets iN orbit.
his law of uNiversal gravitatioN was
revolutioNary aNd due to NewtoN aloNe.
(christiaaN huygeNs, the other great
mechaNist of the era, had iNdepeNdeNtly
deduced that kepler's laws imply iNverse-
square gravitatioN, but he coNsidered the
actioN at a distaNce iN NewtoN's theory to
be "absurd.") NewtoN's other iNtellectual
iNterests iNcluded chemistry, theology,
astrology aNd alchemy.

25. Although this list is concerned only
with mAthemAtics, newton's greAtness
is indicAted by the wide rAnge of his
physics: even without his revolutionAry
lAws of motion And his cooling lAw of
thermodynAmics, he'd be fAmous just for
his work in optics, where he explAined
diffrAction And observed thAt white
light is A mixture of All the rAinbow's
colors. (Although his corpusculAr
theory competed with huygen's wAve
theory, newton understood thAt his
theory wAs incomplete without wAves.)
newton Also designed the first
reflecting telescope, first reflecting
microscope, And the sextAnt.

26. Although others Also developed the
techniques independently, newton is regArded
As the fAther of cAlculus (which he cAlled
"fluxions"); he shAres credit with leibniz for
the fundAmentAl theorem of cAlculus (thAt
integrAtion And differentiAtion Are eAch
other's inverse operAtion). he Applied
cAlculus for severAl purposes: finding AreAs,
tAngents, the lengths of curves And the
mAximA And minimA of functions. in Addition to
severAl other importAnt AdvAnces in
AnAlytic geometry, his mAthemAticAl works
include the binomiAl theorem, his eponymous
numeric method, the ideA of polAr
coordinAtes, And power series for
exponentiAl And trigonometric functions. (his
equAtion ex = ∑ xk / k! hAs been cAlled the
"most importAnt series in mAthemAtics.")

27. he contributed to AlgebrA And the theory of
equAtions; he wAs first to stAte bézout's theorem;
he generAlized déscArtes' rule of signs. (the
generAlized rule of signs wAs incomplete And
finAlly resolved two centuries lAter by sturm And
sylvester.) he developed A series for the Arcsin
function. he developed fActs About cubic equAtions
(just As the "shAdows of A cone" yield All quAdrAtic
curves, newton found A curve whose "shAdows" yield
All cubic curves). he proved thAt sAme-mAss
spheres of Any rAdius hAve equAl grAvitAtionAl
AttrAction: this fAct is key to celestiAl motions. he
discovered puiseux series Almost two centuries
before they were re-invented by puiseux. (like some
of the greAtest Ancient mAthemAticiAns, newton
took the time to compute An ApproximAtion to π; his
wAs better thAn vietA's, though still not As
AccurAte As Al-kAshi's.)

28. Newton is so famous for his calculus, optics and laws of motion,
it is easy to overlook that he was also one of the greatest
geometers. He solved the Delian cube-doubling problem. Even
before the invention of the calculus of variations, Newton was
doing difficult work in that field, e.g. his calculation of the
"optimal bullet shape." Among many marvelous theorems, he
proved several about quadrilaterals and their in- or circum-
scribing ellipses, and constructed the parabola defined by four
given points. He anticipated Poncelet's Principle of Continuity.
An anecdote often cited to demonstrate his brilliance is the
problem of the brachistochrone, which had baffled the best
mathematicians in Europe, and came to Newton's attention late
in life. He solved it in a few hours and published the answer
anonymously. But on seeing the solution Jacob Bernoulli
immediately exclaimed "I recognize the lion by his footprint.

29. In 1687 Newton published Philosophiae Naturalis Principia
Mathematica, surely the greatest scientific book ever written. The
motion of the planets was not understood before Newton, although the
heliocentric system allowed Kepler to describe the orbits. In Principia
Newton analyzed the consequences of his Laws of Motion and
introduced the Law of Universal Gravitation. With the key mystery of
celestial motions finally resolved, the Great Scientific Revolution
began. (In his work Newton also proved important theorems about
inverse-cube forces, work largely unappreciated until
Chandrasekhar's modern-day work.) Newton once wrote "Truth is
ever to be found in the simplicity, and not in the multiplicity and
confusion of things." Sir Isaac Newton was buried at Westminster
Abbey in a tomb inscribed "Let mortals rejoice that so great an
ornament to the human race has existed."

30. Newton ranks #2 on Michael Hart's famous list of the Most
Influential Persons in History. (Muhammed the Prophet of
Allah is #1.) Whatever the criteria, Newton would certainly rank
first or second on any list of physicists, or scientists in general,
but some listmakers would demote him slightly on a list of pure
mathematicians: his emphasis was physics not mathematics, and
the contribution of Leibniz (Newton's rival for the title Inventor
of Calculus) lessens the historical importance of Newton's
calculus. One reason I've ranked him at #1 is a comment by
Gottfried Leibniz himself: "Taking mathematics from the
beginning of the world to the time when Newton lived, what he
has done is much the better part."

31. AcknowledgementAcknowledgement
 Submitted to: HariSubmitted to: Hari
om mishraom mishra
 Prepared by-Prepared by-
 VIPUL SINGHVIPUL SINGH
 AKSHAT KATIYARAKSHAT KATIYAR
 MAYANK RAWATMAYANK RAWAT
 ANSHUL CHAUHANANSHUL CHAUHAN
 ISHU KASHYAPISHU KASHYAP
 CLASS: 9CLASS: 9thth