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 1 
Alan Turing
(English Mathematician Who is Considered as the Father of Theoretical Computer Science and Artificial Intelligence)
Alan Turing
239
Birthdate: June 23, 1912
Sun Sign: Cancer
Birthplace: Maida Vale, London, England
Died: June 7, 1954

Regarded as the father of computer science and artificial intelligence, Alan Turing was a distinguished mathematician and logician. During WWII, he successfully broke the challenging German Enigma machine codes thereby reducing the duration of war by a couple of years. The scientist, who was convicted for being gay, has been an inspiration for numerous films, plays and novels.

 2 
Srinivasa Ramanujan
(Mathematician)
Srinivasa Ramanujan
201
Birthdate: December 22, 1887
Sun Sign: Capricorn
Birthplace: Erode
Died: April 26, 1920

A self-taught genius Indian mathematician, Srinivasa Ramanujan is known for his contributions to mathematical analysis, number theory and continued fractions. Born into a humble family, the celebrated mathematician struggled with poverty but still managed to publish first of his papers in the Journal of the Indian Mathematical Society. Later, his collaboration with English mathematician G. H. Hardy proved very productive.

 3 
Pythagoras
(Greek Philosopher, Mathematician and Founder of Pythagoreanism)
Pythagoras
129
Birthdate: 0570 BC
Birthplace: Samos, Greece
Died: 0495 BC

Pythagoras was an Ionian Greek philosopher. He is credited with many scientific and mathematical discoveries, including the Sphericity of the Earth, the Theory of Proportions, the five regular solids, Pythagorean tuning, and the Pythagorean Theorem. Pythagoras influenced other philosophers like Plato and Aristotle. His philosophy also had a major impact on personalities like Isaac Newton, Johannes Kepler, and Nicolaus Copernicus.

 4 
Aryabhata
(5th & 6th Century Indian Mathematician and Astronomer who Calculated the Value of Pi)
Aryabhata
108
Birthdate: 0476 AD
Birthplace: Assaka
Died: 0550 AD
Indian mathematician and astronomer Aryabhata pioneered the concept of “zero” and used it in his “place value system.” He had also worked on the approximation of pi and laid down the basic concepts of trigonometry, such as sine and cosine. He also mentioned that the Earth rotates on its axis.
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 5 
Ada Lovelace
(Countess of Lovelace)
Ada Lovelace
124
Birthdate: December 10, 1815
Sun Sign: Sagittarius
Birthplace: London
Died: November 27, 1852

Ada Lovelace was a mathematician known for her work on the Analytical Engine, a mechanical general-purpose computer proposed by Charles Babbage. Many believe that Lovelace was the first to recognize the potential of computers. It is also believed that she published the first algorithm after realizing that the algorithm could be carried out by a machine like the Analytical Engine.

 6 
Archimedes
(One of the Leading Scientists in Classical Antiquity and the Greatest Mathematician of Ancient History)
Archimedes
65
Birthdate: 0287 AD
Birthplace: Syracuse, Italy
Died: 0212 AD
Greek mathematician, physicist, and astronomer Archimedes is remembered for his contribution to mathematics, especially geometry. He laid down theorems related to the area of a circle, and the area and volume of a sphere, and reached an accurate value of pi. He also invented machines such as the screw pump.
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 7 
René Déscartes
(French Philosopher, Mathematician and Inventor of ‘Analytic Geometry’)
René Déscartes
72
Birthdate: March 31, 1596
Sun Sign: Aries
Birthplace: Descartes, France
Died: February 11, 1650
René Descartes, the father of modern philosophy, laid down the idea of rationalism, later followed by Spinoza and Leibniz. Descartes also contributed to the field of analytical geometry and led to the Cartesian coordinate system being named after him. His Meditations on First Philosophy is still taught at many universities.
 8 
Euclid
(Greek Mathematician Who is Considered the 'Father of Geometry')
Euclid
62
Birthdate: 0330 AD
Birthplace: Greece
Greek mathematician Euclid, also known as Euclid of Alexandria, is remembered as the father of geometry. One of his most significant works was his book on mathematics, Elements. He had worked extensively on conic sections, spherical geometry, and number theory.
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 9 
Carl F. Gauss
(One of the Greatest Mathematicians of All Tim)
Carl F. Gauss
52
Birthdate: April 30, 1777
Sun Sign: Taurus
Birthplace: Brunswick, Germany
Died: February 23, 1855

German mathematician and physicist Carl Friedrich Gauss is remembered for his work in math and science. Known as the Princeps mathematicorum, he laid down tenets such as the Gauss's Law. He had exhibited his talent since an early age and had completed writing Disquisitiones Arithmeticae by 21.

 10 
John von Neumann
(Great Mathematician Who Were Equally at Home in Pure and Applied Mathematics)
John von Neumann
48
Birthdate: December 28, 1903
Sun Sign: Capricorn
Birthplace: Budapest, Hungary
Died: February 8, 1957
Hungarian-American scientist John von Neumann contributed to the development of game theory and the concept of self-replication. His work covered vast areas including math, economics, physics, and computer science. His research on nuclear physics led him to be part of the advisory committee of the U.S. Atomic Energy Commission.
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 11 
John Forbes Nash Jr.
(Mathematician)
John Forbes Nash Jr.
89
Birthdate: June 13, 1928
Sun Sign: Gemini
Birthplace: Bluefield, West Virginia, United States
Died: May 23, 2015
The inspiration behind the movie A Beautiful Mind, John F. Nash was a legendary mathematician whose work in the area of game theory earned him the Nobel Memorial Prize in Economic Sciences. In his later years, he was riddled with mental illness. He later died in a car crash.
 12 
Leonhard Euler
(Mathematician, Physicist)
Leonhard Euler
37
Birthdate: April 15, 1707
Sun Sign: Aries
Birthplace: Basel
Died: September 18, 1783

Leonhard Euler was a Swiss physicist, mathematician, logician, geographer, astronomer, and engineer. He is credited with making influential and important mathematical discoveries, such as graph theory and infinitesimal calculus. Widely regarded as one of the greatest and most prolific mathematicians of all time, Leonhard Euler also made pioneering contributions to analytic number theory and topology.

 13 
Bertrand Russell
(Philosopher)
Bertrand Russell
62
Birthdate: May 18, 1872
Sun Sign: Taurus
Birthplace: Trellech, Monmouthshire, Wales
Died: February 2, 1970

Bertrand Russell was a British polymath and Nobel laureate. His work, which is spread across various fields, has had a considerable influence on philosophy, cognitive science, artificial intelligence, mathematics, linguistics, and logic. Russell is also credited with leading the revolt against idealism in Britain and is regarded as one of the founders of analytic philosophy.

 14 
Charles Babbage
(Father of the computer)
Charles Babbage
70
Birthdate: December 26, 1791
Sun Sign: Capricorn
Birthplace: London, England
Died: October 18, 1871
Charles Babbage, or the “father of the computer,” invented the prototype of the world’s first mechanical calculator, the Difference Engine. With the help of mathematician Ada Lovelace, he also created the Analytical Engine, the first general-purpose computer and a precursor of the modern computer, with its looping and sequential mechanism.
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 15 
Blaise Pascal
(One of the Greatest Mathematicians of All Time Who Invented the Mechanical Calculator)
Blaise Pascal
49
Birthdate: June 19, 1623
Sun Sign: Gemini
Birthplace: Clermont-Ferrand, France
Died: August 19, 1662

Blaise Pascal was a French physicist, mathematician, philosopher, and inventor. A child prodigy, Pascal's work on projective geometry, at the age of 16 is commendable. He is one of the earliest inventors of the mechanical calculator, which he did when he was still a teenager. His work on probability theory influenced the development of social science and modern economics.

 16 
Claudius Ptolemy
(Astronomer, Cartographer & Mathematician)
Claudius Ptolemy
52
Birthdate: 0090 AD
Birthplace: Egypt
Died: 0168 AD
Claudius Ptolemy was a 2nd-century mathematician, astronomer, astrologer, and geographer, who had written a number of scientific treatises, such as The Great Treatise, Geography, and the Tetrábiblos. He lived in Alexandria under the Roman rule in Egypt. He had also authored Harmonics, a book on music theory.
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 17 
Avicenna
(Persian polymath the most significant physiciansand writers of the Islamic Golden Age, and the father of early modern medicine.)
Avicenna
34
Birthdate: 0980 AD
Birthplace: Afshona, Uzbekistan
Died: May 31, 1037
Renowned as father of early modern medicine, Avicenna was an illustrious Persian polymath. He is specifically distingusihed for his contributions in the fields of medicine and Aristotelian philisophy. He is best-known for his works namely, The Canon of Medicine and The Book of Healing. The corpus of his writings also include alchemy, geology, psychology, geography, physics, poetry and Islamic theology.
 18 
Johannes Kepler
(Astronomer Best Known for his Laws of Plantery Motion)
Johannes Kepler
39
Birthdate: December 27, 1571
Sun Sign: Capricorn
Birthplace: Weil der Stadt, Germany
Died: November 15, 1630

This 17th-century German mathematician, astronomer, and astrologer is remembered for his pathbreaking work on optics. He invented a developed version of the refracting telescope. He also laid down Kepler's laws of planetary motion and wrote Astronomia Nova, Harmonices Mundi, and Epitome Astronomiae Copernicanae.

 19 
James Maxwell
(Scottish Mathematician and Scientist Who Gave the Classical Theory of Electromagnetic Radiation)
James Maxwell
24
Birthdate: June 13, 1831
Sun Sign: Gemini
Birthplace: Edinburgh, Scotland
Died: November 5, 1879

Scottish physicist James Maxwell’s contributions included the formulation of the classical theory of electromagnetic radiation and the production of the first light-fast color photograph. His Maxwell–Boltzmann distribution explored the kinetic theory of gases. He has also written poems and was an Elder of the Church of Scotland.

 20 
Hypatia
(Mathematician, Astronomer and Philosopher)
Hypatia
43
Birthdate: 0350 AD
Birthplace: Alexandria, Egypt
Died: February 29, 0415
Hypatia was a Hellenistic Neoplatonist philosopher, mathematician, and astronomer who lived during the 4th and 5th centuries. She also taught and served as a counselor. She is remembered for her commentary on Diophantus's Arithmetica. She was later murdered and became a symbol of feminism and of opposition to Catholic ideals.
 21 
Galileo Galilei
(Known as “Father” of Observational Astronomy who Invented the ‘Thermoscope’ and Various Military Compasses)
Galileo Galilei
25
Birthdate: February 15, 1564
Sun Sign: Aquarius
Birthplace: Pisa, Italy
Died: January 8, 1642

An Italian astronomer, engineer, and physicist, Galileo Galilei is widely regarded as the father of observational astronomy, the father of the scientific method, the father of modern physics, and the father of modern science. He is credited with popularizing the telescope, which changed the course of history.

 22 
Leonardo Fibonacci
(Italian Mathematician Who was Considered to be One of the Most Talented Western Mathematicians of the Middle Ages)
Leonardo Fibonacci
22
Birthdate: 1170 AD
Birthplace: Pisa, Italy
Died: 1250 AD
Medieval Italian mathematician Leonardo Fibonacci is remembered for introducing the Hindu–Arabic numeral system to Europe through his book Liber abaci. Son of an Italian trader, he interacted with merchants along the Mediterranean coast to learn about their system of calculations. The Fibonacci sequence, too, was invented by him. 
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 23 
Grigori Perelman
(Mathematician)
Grigori Perelman
37
Birthdate: June 13, 1966
Sun Sign: Gemini
Birthplace: Saint Petersburg, Russia
Russian mathematician Grigori Perelman is best known for his work on geometry, especially Riemannian geometry, geometric analysis, and geometric topology. He declined many prizes, such as the Fields Medal and the Millennium Prize. His proof of the Poincaré conjecture was named the Breakthrough of the Year by Science magazine.
 24 
Omar Khayyam
(Mathematician)
Omar Khayyam
45
Birthdate: May 18, 1048
Sun Sign: Taurus
Birthplace: Nishapur, Khorasan, Iran
Died: December 4, 1131

Omar Khayyam was a Persian polymath, mathematician, philosopher, astronomer, and poet. In the field of mathematics, he is best known for his work on the classification and solution of cubic equations. As an astronomer, he designed a solar calendar known as the Jalali calendar. His philosophical attitude towards life had elements of pessimism, nihilism, Epicureanism, and fatalism. 

 25 
Kurt Gödel
(Mathematician, Philosopher and One of the Most Significant Logicians in History)
Kurt Gödel
25
Birthdate: April 28, 1906
Sun Sign: Taurus
Birthplace: Brno, Czech Republic
Died: January 14, 1978

Hailed as one of the greatest logicians since Aristotle, Kurt Gödel was Austrian-born American mathematician, logician, and philosopher, who earned international stardom for his incompleteness theorem. Also credited with developing a technique called Gödel numbering, he later started working on Mathematical Platonism, a philosophical theory that failed to attract wide acceptance.

 26 
Eratosthenes
(First Person to Calculate the Circumference of the Earth and Earth's Axial Tilt)
Eratosthenes
36
Birthdate: 0276 BC
Birthplace: Cyrene, Libya, Shahat, Libya
Died: 0194 BC

Greek polymath Eratosthenes of Cyrene was a mathematician, poet, geographer, music theorist, and astronomer. He also served as the Library of Alexandria’s chief librarian. He was also the first to calculate the Earth’s circumference and the tilt of the Earth's axis. Nicknamed Pentathlos, he also invented many scientific terms.

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 27 
George Boole
(Mathematician, Philosopher, and Logician Best Known as the Author of ‘The Laws of Thought’)
George Boole
33
Birthdate: November 2, 1815
Sun Sign: Scorpio
Birthplace: Lincoln, Lincolnshire, England
Died: December 8, 1864

George Boole is remembered for pioneering Boolean algebra, a tool used in digital computer circuits. More of a self-taught mathematician, Boole began teaching at 16 and later grew up to be a math professor at Queen’s College, Cork. His work in differential equations and algebraic logic was groundbreaking.

 28 
Brahmagupta
(Mathematician and Astronomer)
Brahmagupta
39
Birthdate: 0598 AD
Birthplace: Bhinmal
Died: 0670 AD

Ancient Indian astronomer and mathematician Brahmagupta is best remembered for laying down rules to calculate with zero and for penning the texts Brāhmasphuṭasiddhānta and Khaṇḍakhādyaka. His other achievements include his work on surds and positive and negative numbers. He also devised a formula for the area of a cyclic quadrilateral.

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 29 
Muḥammad ibn Mūsā al-Khwārizmī
21
Birthdate: 0780 AD
Birthplace: Khwarazm, Uzbekistan
Died: 0850 AD

Muhammad ibn Musa al-Khwarizmi was a Persian polymath credited with producing influential works in the fields of geography, astronomy, and mathematics. He is referred to as the founder or father of algebra as he was the first person to recognize algebra as an independent discipline. He also made significant contributions to trigonometry; he produced precise sine and cosine tables.

 30 
Thales
(Philosopher)
Thales
25
Birthdate: 0624 BC
Birthplace: Miletus Ancient Theater, Turkey
Died: 0546 BC

One of the Seven Wise Men of Greece, Thales was a 6th-century mathematician who believed that the Earth was a flat disk floating on a huge ocean. Legend has it that he had predicted a solar eclipse that stopped a major battle and had also laid down several geometrical theorems.

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 31 
G. H. Hardy
(English Mathematician Known for His Contributions in Number Theory and Mathematical Analysis)
G. H. Hardy
25
Birthdate: February 7, 1877
Sun Sign: Aquarius
Birthplace: Cranleigh, England
Died: December 1, 1947

English mathematician G. H. Hardy is best recognised for his work and achievements in number theory and mathematical analysis, and also as mentor of distinguished Indian mathematician Srinivasa Ramanujan. He is noted for his essay on mathematics titled A Mathematician's Apology. He also made his mark in biology formulating a basic principle of population genetics called Hardy–Weinberg principle.  

 32 
David Hilbert
(Mathematician)
David Hilbert
20
Birthdate: January 23, 1862
Sun Sign: Aquarius
Birthplace: Königsberg or Wehlau, Province of Prussia (today Znamensk, Kaliningrad Oblast, Russia)
Died: February 14, 1943

German mathematician David Hilbert was first drawn to math inspired by his mother, who was a budding math enthusiast. He contributed to a host of concepts, theories, and postulates, such as Hilbert space, Hilbert's program, and Hilbert's problems. He died in oblivion, with a handful of people at his funeral.

 33 
Georg Cantor
(Mathematician)
Georg Cantor
20
Birthdate: March 3, 1845
Sun Sign: Pisces
Birthplace: Saint Petersburg, Russian Empire
Died: January 6, 1918
Georg Cantor is remembered as the man behind the set theory of mathematics. Not known to many, he was a skilled violinist, too. He was one of the first to explore infinity. His final years were riddled with mental ailments, when he believed Shakespeare’s plays were written by Francis Bacon.
 34 
Paul Erdős
(Mathematician)
Paul Erdős
34
Birthdate: March 26, 1913
Sun Sign: Aries
Birthplace: Budapest, Austria-Hungary
Died: September 20, 1996

Hungarian mathematician Paul Erdős spent most of his childhood at home, due to his mother’s overprotectiveness after his sisters died of scarlet fever. Known for his eccentricity, he used his own vocabulary. His contributions include the Ramsey theory, and he skipped many university job offers to continue working independently.

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 35 
Terence Tao
(One of the Greatest Living Mathematicians Who is Referred to as the 'Mozart of Mathematics')
Terence Tao
31
Birthdate: July 17, 1975
Sun Sign: Cancer
Birthplace: Adelaide, Australia

Terence Tao is an Australian-American mathematician who works at the University of California, Los Angeles as a professor of mathematics. Widely considered one of the most prominent living mathematicians, Tao was honored with the prestigious Fields Medal in 2006. In 2014, he was awarded the Breakthrough Prize in Mathematics.

 36 
Emmy Noether
(German Mathematician Who Made Many Important Contributions to Abstract Algebra)
Emmy Noether
27
Birthdate: March 23, 1882
Sun Sign: Aries
Birthplace: Erlangen, Bavaria, Germany
Died: April 14, 1935

Emmy Noether was a German mathematician best remembered for her contributions to abstract algebra. She is credited with discovering Noether's theorem, which is regarded as a fundamental theorem in mathematical physics. One of the most important mathematicians of her generation and the most important woman in mathematics history, Emmy Noether developed theories of algebras, fields, and rings.

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 37 
Pierre-Simon Laplace
(French Mathematician and Astronomer Who was Best Known for His Investigations into the Stability of the Solar System)
Pierre-Simon Laplace
26
Birthdate: March 23, 1749
Sun Sign: Aries
Birthplace: Beaumont-en-Auge, France
Died: March 5, 1827

Though French scholar Pierre-Simon Laplace is primarily known for his work on the solar system, his research extended to areas such as mathematics and physics, apart from astronomy. Widely known as the Newton of France, he escaped being executed during the French Revolution, owing to his lack of political views.

 38 
Benoit Mandelbrot
(American Mathematician and Polymath Best Known for Popularizing the Concept of Fractal Geometry)
Benoit Mandelbrot
42
Birthdate: November 20, 1924
Sun Sign: Scorpio
Birthplace: Warsaw, Poland
Died: October 14, 2010

Noted mathematician and polymath, Benoit B. Mandelbrot is perhaps best known for his work on fractal. He not only coined the term, but also used computer-constructed images to illustrate the mathematical definition. Also credited with the discovery of Mandelbrot set and Mandelbrot law, he established that even those things which were apparently chaotic or rough had a "degree of order".

 39 
Isaac Newton
(One of the Most Influential Scientists of All Time)
Isaac Newton
36
Birthdate: January 4, 1643
Sun Sign: Capricorn
Birthplace: Lincolnshire, England
Died: March 31, 1727

One of the most influential and popular scientists of all time, Sir Isaac Newton played a prominent role in our understanding of natural phenomena. He formulated the law of universal gravitation and laws of motion. He also developed the Newtonian telescope among other devices. Apart from science, Newton was also intrigued by religion, occult, and alchemy.

 40 
Henri Poincare
(French Polymath and Mathematician Known as One of the Founders of the 'Field of Topology')
Henri Poincare
16
Birthdate: April 29, 1854
Sun Sign: Taurus
Birthplace: Nancy, France
Died: July 17, 1912
Known as The Last Universalist for his expertise in a variety of domains, French mathematician Henri Poincare conducted research that formed the basis of the modern chaos theory. Apart from his work on relativity and the three-body problem, he also laid the foundation of algebraic topology.
 41 
Évariste Galois
(Mathematician)
Évariste Galois
24
Birthdate: October 25, 1811
Sun Sign: Scorpio
Birthplace: Bourg-la-Reine, French Empire
Died: May 31, 1832

Évariste Galois was a French mathematician best remembered for solving a 350-year-old problem when he was still in his teens. His work formed the basis for group theory and Galois theory, two important branches of abstract algebra. Also a political activist, Évariste Galois died at the age of 20 after suffering wounds in a duel.

 42 
Bernhard Riemann
(Mathematician)
Bernhard Riemann
16
Birthdate: September 17, 1826
Sun Sign: Virgo
Birthplace: Breselenz
Died: July 20, 1866

Bernhard Riemann was a German mathematician best remembered for his contributions to number theory, analysis, and differential geometry. His paper on the prime-counting function, which was published in 1859, is considered one of the most influential papers in the history of analytic number theory. Riemann is widely regarded as one of the greatest mathematicians ever.

 43 
John Horton Conway
(British Mathematician Known for His Contributions to 'Combinatorial Game Theory (CGT)')
John Horton Conway
30
Birthdate: December 26, 1937
Sun Sign: Capricorn
Birthplace: Liverpool, England
Died: April 11, 2020

Remembered as versatile mathematician, game wizard and polymath, John Horton Conway had limitless curiosity, which matched with his scientific originality. Although he is best known for devising the cellular automation called Game of Life, he made significant contributions to group theory, number theory, algebra, geometric topology, theoretical physics, combinatorial game theory and geometry. Conway published many outstanding papers in these fields.

 44 
Katherine Johnson
(Mathematician and One of the First African-American Women to Work as a NASA Scientist)
Katherine Johnson
82
Birthdate: August 26, 1918
Sun Sign: Virgo
Birthplace: White Sulphur Springs, West Virginia, United States
Died: February 24, 2020
Katherine Johnson was a physicist and mathematician, remembered as the first African-American female NASA scientist. Her calculations helped launch the space missions of Alan Shepard and John Glenn. She was crucial to the Apollo program and won a Congressional Gold Medal and a Presidential Medal of Freedom for her achievements.
 45 
Christiaan Huygens
(Mathematician, Physicist)
Christiaan Huygens
30
Birthdate: April 14, 1629
Sun Sign: Aries
Birthplace: The Hague, Netherlands
Died: July 8, 1695

From proposing the wave theory of light to discovering the actual shape of the rings of Saturn and inventing the pendulum clock, Dutch scientist Christiaan Huygens had contributed a lot to science. Born to a diplomat, Huygens had the privilege of an elite education but remain sickly throughout his life.

 46 
Joseph Fourier
(Mathematician & Physicist)
Joseph Fourier
15
Birthdate: March 21, 1768
Sun Sign: Aries
Birthplace: Auxerre, Burgundy, Kingdom of France (now in Yonne, France)
Died: May 16, 1830

Joseph Fourier was a French physicist and mathematician best remembered for commencing the investigation of the Fourier series, which is used widely to solve problems of heat transfer and vibrations. Fourier's law of conduction and Fourier transform are named in his honor. Fourier is also said to have discovered the greenhouse effect.

 47 
Alexander Grothendieck
(French Mathematician and a Pioneer in the Field of 'Modern Algebraic Geometry')
Alexander Grothendieck
24
Birthdate: March 28, 1928
Sun Sign: Aries
Birthplace: Berlin, Germany
Died: November 13, 2014

Alexander Grothendieck was a 20th-century mathematician who was a leading figure in the creation of modern algebraic geometry. With his so-called "relative" perspective, he revolutionized many areas of pure mathematics. During his later career, he became a professor at the University of Montpellier. He is counted among the greatest mathematicians of the 20th century.

 48 
Nicolaus Copernicus
(Polish Astronomer Who Proposed That the Earth Revolves Around the Sun)
Nicolaus Copernicus
23
Birthdate: February 19, 1473
Sun Sign: Pisces
Birthplace: Toruń, Poland
Died: May 24, 1543

Nicolaus Copernicus was a mathematician and astronomer. He is credited with formulating Heliocentrism, which led to the Copernican Revolution. Although Aristarchus of Samos had formulated Heliocentrism 18 centuries earlier, Copernicus was responsible for popularizing it. Copernicus is also credited with formulating an economic principle, which was later called Gresham's law.

 49 
John Napier
(Inventor of Logarithms)
John Napier
27
Birthdate: February 1, 1550
Sun Sign: Aquarius
Birthplace: Merchiston Tower, Edinburgh
Died: April 4, 1617

John Napier was a Scottish mathematician, astronomer, and physicist. He is credited with introducing logarithms as a means of simplifying calculations. He also invented Napier's bones, a manually-operated calculating device. In addition to his interest in mathematics, John Napier was also known for his skills as a magician; it is said that he dabbled in necromancy and alchemy.

 50 
Pierre de Fermat
(French Mathematician and Founder of the Modern Theory of Numbers)
Pierre de Fermat
14
Birthdate: December 6, 1607
Sun Sign: Sagittarius
Birthplace: Beaumont-de-Lomagne, France
Died: January 12, 1665

Seventeenth-century French mathematician Pierre de Fermat was also a qualified lawyer. Remembered mostly for his contribution to number theory, probability, calculus, and analytic geometry, he was also known for his proficiency in six languages, including Greek and Latin. One of his major works, Introduction to Loci, was released posthumously.