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Archimedes

For other senses of this word, see Archimedes (disambiguation).
Archimedes of Syracuse.

Archimedes (Greek: ΑΡΧΙΜΗΔΗΣ) (287 BC–212 BC) was an Ancient mathematician, physicist, engineer, astronomer and philosopher born in the Greek seaport colony of Syracuse. He is considered by some math historians to be one of history's greatest mathematicians, along with possibly Newton, Gauss and Euler.

Discoveries and inventions

The Archimedes' screw lifts water to higher levels for irrigation

Archimedes became a popular figure as a result of his involvement in the defense of Syracuse against the Roman siege in the First and Second Punic Wars. He is reputed to have held the Romans at bay with war machines of his own design; to have been able to move a full-size ship complete with crew and cargo by pulling a single rope; to have discovered the principles of density and buoyancy, also known as Archimedes' principle, while taking a bath (thereupon taking to the streets naked calling "eureka" - "I have found it!"); and to have invented the irrigation device known as Archimedes' screw.

He has also been credited with the possible invention of the odometer during the First Punic War. One of his inventions used for military defense of Syracuse against the invading Romans was the claw of Archimedes.

It is said that he prevented one Roman attack on Syracuse by using a large array of mirrors (speculated to have been highly polished shields) to reflect sunlight onto the attacking ships causing them to catch fire. This popular legend was tested on the Discovery Channel's Mythbusters program. After a number of experiments, whereby the hosts of the program tried burning a model wooden ship with a variety of mirrors, they concluded that the enemy ships would have had to have been virtually motionless and very close to shore for them to ignite, an unlikely scenario during a battle.

Archimedes was killed by a Roman soldier in the sack of Syracuse during the Second Punic War, despite orders from the Roman general, Marcellus, that he was not to be harmed. The Greeks said that he was killed while drawing an equation in the sand, and told this story to contrast their high-mindedness with Roman ham-handedness; however, it should be noted that Archimedes designed the siege engines that devastated a substantial Roman invasion force, so his death may have been out of retribution.

In creativity and insight, he exceeded any other mathematician prior to the European Renaissance. In a civilization with an awkward numeral system and a language in which "a myriad" (literally "ten thousand") meant "infinity", he invented a positional numeral system and used it to write numbers up to 1064. He devised a heuristic method based on statistics to do private calculation that we would classify today as integral calculus, but then presented rigorous geometric proofs for his results. To what extent he actually had a correct version of integral calculus is debatable. He proved that the ratio of a circle's perimeter to its diameter is the same as the ratio of the circle's area to the square of the radius. He did not call this ratio π but he gave a procedure to approximate it to arbitrary accuracy and gave an approximation of it as between 3 + 1/7 and 3 + 10/71. He was the first, and possibly the only, Greek mathematician to introduce mechanical curves (those traced by a moving point) as legitimate objects of study. He proved that the area enclosed by a parabola and a straight line is 4/3 the area of a triangle with equal base and height. (See the illustration below. The "base" is any secant line, not necessarily orthogonal to the parabola's axis; "the same base" means the same "horizontal" component of the length of the base; "horizontal" means orthogonal to the axis. "Height" means the length of the segment parallel to the axis from the vertex to the base. The vertex must be so placed that the two horizontal distances mentioned in the illustration are equal.)


In the process, he calculated the oldest known example of a geometric series with the ratio 1/4:

If the first term in this series is the area of the triangle in the illustration then the second is the sum of the areas of two triangles whose bases are the two smaller secant lines in the illustration. Essentially, this paragraph summarizes the proof. Archimedes also gave a quite different proof of nearly the same proposition by a method using infinitesimals (see "How Archimedes used infinitesimals").

He proved that the area and volume of the sphere are in the same ratio to the area and volume of a circumscribed straight cylinder, a result he was so proud of that he made it his epitaph.

Archimedes is probably also the first mathematical physicist on record, and the best before Galileo and Newton. He invented the field of statics, enunciated the law of the lever, the law of equilibrium of fluids and the law of buoyancy. (He famously discovered the latter when he was asked to determine whether a crown had been made of pure gold, or gold adulterated with silver; he realized that the rise in the water level when it was immersed would be equal to the volume of the crown, and the decrease in the weight of the crown would be in proportion; he could then compare those with the values of an equal weight of pure gold). He was the first to identify the concept of center of gravity, and he found the centers of gravity of various geometric figures, assuming uniform density in their interiors, including triangles, paraboloids, and hemispheres. Using only ancient Greek geometry, he also gave the equilibrium positions of floating sections of paraboloids as a function of their height, a feat that would be taxing to a modern physicist using calculus.

Apart from general physics he was an astronomer, and Cicero writes that the Roman consul Marcellus brought two devices back to Rome from the sacked city of Syracuse. One device mapped the sky on a sphere and the other predicted the motions of the sun and the moon and the planets (i.e., an orrery). He credits Thales and Eudoxus for constructing these devices. For some time this was assumed to be a legend of doubtful nature, but the discovery of the Antikythera mechanism has changed the view of this issue, and it is indeed probable that Archimedes possessed and constructed such devices. Pappus of Alexandria writes that Archimedes had written a practical book on the construction of such spheres entitled On Sphere-Making.

Archimedes' works were not widely recognized, even in antiquity. He and his contemporaries probably constitute the peak of Greek mathematical rigour. During the Middle Ages the mathematicians who could understand Archimedes' work were few and far between. Many of his works were lost when the library of Alexandria was burnt (twice actually) and survived only in Latin or Arabic translations. As a result, his mechanical method was lost until around 1900, after the arithmetization of analysis had been carried out successfully. We can only speculate about the effect that the "method" would have had on the development of calculus had it been known in the 16th and 17th centuries.

Writings by Archimedes

  • On the Equilibrium of Planes (2 volumes)
This scroll explains the law of the lever and uses it to calculate the areas and centers of gravity of various geometric figures.
  • On Spirals
In this scroll, Archimedes defines what is now called Archimedes' spiral. This is the first mechanical curve (i.e., traced by a moving point) ever considered by a Greek mathematician. Using this curve, he was able to square the circle.
  • On the Sphere and The Cylinder
In this scroll Archimedes obtains the result he was most proud of: that the area and volume of a sphere are in the same relationship to the area and volume of the circumscribed straight cylinder.
  • On Conoids and Spheroids
In this scroll Archimedes calculates the areas and volumes of sections of cones, spheres and paraboloids.
  • On Floating Bodies (2 volumes)
In the first part of this scroll, Archimedes spells out the law of equilibrium of fluids, and proves that water around a center of gravity will adopt a spherical form. This is probably an attempt at explaining the observation made by Greek astronomers that the Earth is round. Note that his fluids are not self-gravitating: he assumes the existence of a point towards which all things fall and derives the spherical shape. One is led to wonder what he would have done had he struck upon the idea of universal gravitation.
In the second part, a veritable tour-de-force, he calculates the equilibrium positions of sections of paraboloids. This was probably an idealization of the shapes of ships' hulls. Some of his sections float with the base under water and the summit above water, which is reminiscent of the way icebergs float, although Archimedes probably was not thinking of this application.
  • The Quadrature of the Parabola
In this scroll, Archimedes calculates the area of a segment of a parabola (the figure delimited by a parabola and a secant line not necessarily perpendicular to the axis). The final answer is obtained by triangulating the area and summing the geometric series with ratio 1/4.
  • Stomachion
This is a Greek puzzle similar to Tangram. In this scroll, Archimedes calculates the areas of the various pieces. This may be the first reference we have to this game. Recent discoveries indicate that Archimedes was attempting to determine how many ways the strips of paper could be assembled into the shape of a square. This is possibly the first use of combinatorics to solve a problem.
  • Archimedes' Cattle Problem
Archimedes wrote a letter to the scholars in the Library of Alexandria, who apparently had downplayed the importance of Archimedes' works. In these letters, he dares them to count the numbers of cattle in the Herd of the Sun by solving a number of simultaneous Diophantine equations, some of them quadratic (in the more complicated version). This problem is one of the famous problems solved with the aid of a computer. The solution is a very large number, approximately 7.760271 × 10206544 (See the external links to the Cattle Problem.)
  • The Sand Reckoner
In this scroll, Archimedes counts the number of grains of sand fitting inside the universe. This book mentions Aristarchus' theory of the solar system, contemporary ideas about the size of the Earth and the distance between various celestial bodies. From the introductory letter we also learn that Archimedes' father was an astronomer.
  • "The Method"
In this work, which was unknown in the Middle Ages, but the importance of which was realised after its discovery, Archimedes pioneered the use of infinitesimals, showing how breaking up a figure in an infinite number of infinitely small parts could be used to determine its area or volume. Archimedes did probably consider these methods not mathematically precise, and he used these methods to find at least some of the areas or volumes he sought, and then used the more traditional method of exhaustion to prove them. This particular work is found in what is called the Archimedes Palimpsest. Some details can be found at how Archimedes used infinitesimals.

Quotes about Archimedes

  • "Perhaps the best indication of what Archimedes truly loved most is his request that his tombstone include a cylinder circumscribing a sphere, accompanied by the inscription of his amazing theorem that the sphere is exactly two-thirds of the circumscribing cylinder in both surface area and volume!" (Laubenbacher and Pengelley, p. 95)1
  • "...but regarding the work of an engineer and every art that ministers the needs of life as ignoble and vulgar, he devoted his earnest efforts only to those studies the subtlety and charm of which are not affected by the claims of necessity." Plutarch, possibly explaining why Archimedes produced no writings that describe precisely the design of his inventions. It has also been suggested that this statement merely reflects the prejudices of Plutarch and his peers, influenced by Platonic beliefs in pure reasoning and deduction over experimentation and inductive processes. Given Archimedes's prodigious output as an engineer, Plutarch's often quoted comments on him seem hard to believe by modern historians.

Named after Archimedes

  • Archimedes crater on the Moon.
  • Asteroid 3600 Archimedes, named in his honour
  • The Acorn Archimedes

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We can only speculate about the effect that the "method" would have had on the development of calculus had it been known in the 16th and 17th centuries. During the 2005 season, Manny Ramírez is the 3rd highest paid player in Major League Baseball at the yearly salary of $19,906,820.00. As a result, his mechanical method was lost until around 1900, after the arithmetization of analysis had been carried out successfully. His season was capped off by being named the MVP of the World Series as he led the Red Sox to their first title since 1918. Many of his works were lost when the library of Alexandria was burnt (twice actually) and survived only in Latin or Arabic translations. Along with Derek Jeter (a single), Ichiro Suzuki (a double) and Iván Rodríguez (a triple), Ramírez made history as the American League became the first All-Star team to hit for the cycle during the same inning. During the Middle Ages the mathematicians who could understand Archimedes' work were few and far between. In the All-Star Game, facing Roger Clemens in the top of the first inning, Ramirez knocked out a two-run home run giving his teammates an immediate 3-0 lead.

He and his contemporaries probably constitute the peak of Greek mathematical rigour. Also along with Ortiz, Ramírez hit back-to-back home runs six times, tying the major league single season set by Hank Greenberg and Rudy York (Detroit Tigers) and Frank Thomas and Magglio Ordóñez (Chicago White Sox). Archimedes' works were not widely recognized, even in antiquity. In addition, Ramírez and David Ortiz became the first pair of American League teammates to hit 40 home runs, have 100 RBI, and bat .300 since the Yankees Babe Ruth and Lou Gehrig in 1931, and the first Red Sox duo with 40 homers since Tony Armas and Jim Rice (1984). Pappus of Alexandria writes that Archimedes had written a practical book on the construction of such spheres entitled On Sphere-Making. He led the American League in home runs (43), slugging average (.613) and OPS (1.009); finished 3rd in RBI (130), 6th in on base percentage (.397), 8th in base on balls (82), 10th in runs (108), and posted a .308 batting average. For some time this was assumed to be a legend of doubtful nature, but the discovery of the Antikythera mechanism has changed the view of this issue, and it is indeed probable that Archimedes possessed and constructed such devices. Coupled with impressive play on the field, this absolved Ramírez in the eyes of many Boston fans and sportswriters.

He credits Thales and Eudoxus for constructing these devices. He displayed a good attitude and an enthusiasm for playing, two qualities his critics had charged that he lacked. One device mapped the sky on a sphere and the other predicted the motions of the sun and the moon and the planets (i.e., an orrery). In 2004, nevertheless, Ramírez silenced his critics. Apart from general physics he was an astronomer, and Cicero writes that the Roman consul Marcellus brought two devices back to Rome from the sacked city of Syracuse. All 29 other teams passed, due to the length and costs of his contract. Using only ancient Greek geometry, he also gave the equilibrium positions of floating sections of paraboloids as a function of their height, a feat that would be taxing to a modern physicist using calculus. After the season, the Red Sox put him on irrevocable waivers, meaning he was had but for the asking.

He was the first to identify the concept of center of gravity, and he found the centers of gravity of various geometric figures, assuming uniform density in their interiors, including triangles, paraboloids, and hemispheres. Despite his strong play in the 2003 post-season, Ramírez's Red Sox lost in heartbreaking fashion to Wilson's Yankees in the ALCS. (He famously discovered the latter when he was asked to determine whether a crown had been made of pure gold, or gold adulterated with silver; he realized that the rise in the water level when it was immersed would be equal to the volume of the crown, and the decrease in the weight of the crown would be in proportion; he could then compare those with the values of an equal weight of pure gold). When it was learned that he had been seen in a hotel bar with close friend, Yankees infielder Enrique Wilson, the controversy grew, causing Boston manager Grady Little to bench Ramírez for one game. He invented the field of statics, enunciated the law of the lever, the law of equilibrium of fluids and the law of buoyancy. Some Red Sox fans criticized the outfielder, saying he should have played despite the ailment. Archimedes is probably also the first mathematical physicist on record, and the best before Galileo and Newton. In the summer of 2003, Ramirez found himself as the latest victim of the Boston Sports Media's thirst for blood when he missed several games with pharyngitis.

He proved that the area and volume of the sphere are in the same ratio to the area and volume of a circumscribed straight cylinder, a result he was so proud of that he made it his epitaph. His 165 RBI total in 1999 was the highest by any player since Jimmie Foxx in 1938; and made him the first player to have more RBI's than games played in a season since Ted Williams in 1949. Archimedes also gave a quite different proof of nearly the same proposition by a method using infinitesimals (see "How Archimedes used infinitesimals"). He made the All-Star team four times, and hit 127 homers and 432 RBI in 415 games over last three seasons. Essentially, this paragraph summarizes the proof. From 1993 to 2000 Ramírez collected 236 home runs and 804 RBI in 967 games for the Cleveland Indians, including a career-high 45 home runs in 1998, and a team-record career-high 165 RBI in 1999, when he hit .333 with 44 homers and 131 runs (also a career-high). If the first term in this series is the area of the triangle in the illustration then the second is the sum of the areas of two triangles whose bases are the two smaller secant lines in the illustration. During the 2004 season, he was nominated for play of the year because of a spectacular catch he made in left field at Yankee Stadium to rob Miguel Cairo of a home-run.

In the process, he calculated the oldest known example of a geometric series with the ratio 1/4:. While playing for Cleveland in the sixth inning of Game 6 of the 1998 American League Championship Series, he turned his back on a line drive off the bat of the New York Yankees Derek Jeter and attempted a leaping catch at the top of the right field wall, only to have the ball hit him in the back of the feet. The vertex must be so placed that the two horizontal distances mentioned in the illustration are equal.). Ramirez has been known to be involved in several comical misadventures while playing the outfield. "Height" means the length of the segment parallel to the axis from the vertex to the base. Ramírez is aggressive playing balls off the Green Monster and holding runners to singles. The "base" is any secant line, not necessarily orthogonal to the parabola's axis; "the same base" means the same "horizontal" component of the length of the base; "horizontal" means orthogonal to the axis. He still has trouble at times with footwork, his range is limited, but his arm is fairly strong and he has soft hands.

(See the illustration below. Ramírez is a serviceable fielder, although is unlikely to win any Gold Glove Awards. He proved that the area enclosed by a parabola and a straight line is 4/3 the area of a triangle with equal base and height. He has good power that way and seems content to go with the pitch, but he is not afraid to take the occasional free walk. He was the first, and possibly the only, Greek mathematician to introduce mechanical curves (those traced by a moving point) as legitimate objects of study. He does most of his damage from center field to the right field line. He did not call this ratio π but he gave a procedure to approximate it to arbitrary accuracy and gave an approximation of it as between 3 + 1/7 and 3 + 10/71. He combines power, contact and patience at the plate, against left-handed pitchers and righties equally well, but he still doesn't pull the ball very often for a power hitter.

He proved that the ratio of a circle's perimeter to its diameter is the same as the ratio of the circle's area to the square of the radius. Ramirez is universally considered one of the best all-around righthanded hitters in the American League. To what extent he actually had a correct version of integral calculus is debatable. He has totaled 390 home runs and 1270 RBI in 1535 games. He devised a heuristic method based on statistics to do private calculation that we would classify today as integral calculus, but then presented rigorous geometric proofs for his results. Through the 2004 season, Ramírez is a career .316 hitter, with a .397 on base percentage and a .613 slugging average. In a civilization with an awkward numeral system and a language in which "a myriad" (literally "ten thousand") meant "infinity", he invented a positional numeral system and used it to write numbers up to 1064. .

In creativity and insight, he exceeded any other mathematician prior to the European Renaissance. In 2004, he became an American Citizen. The Greeks said that he was killed while drawing an equation in the sand, and told this story to contrast their high-mindedness with Roman ham-handedness; however, it should be noted that Archimedes designed the siege engines that devastated a substantial Roman invasion force, so his death may have been out of retribution. Though originally from the Dominican Republic, he grew up in the Washington Heights section of New York City a short distance away from Yankee Stadium. Archimedes was killed by a Roman soldier in the sack of Syracuse during the Second Punic War, despite orders from the Roman general, Marcellus, that he was not to be harmed. He bats and throws right-handed. After a number of experiments, whereby the hosts of the program tried burning a model wooden ship with a variety of mirrors, they concluded that the enemy ships would have had to have been virtually motionless and very close to shore for them to ignite, an unlikely scenario during a battle. Previously, Ramírez played with the Cleveland Indians (1993-2000).

This popular legend was tested on the Discovery Channel's Mythbusters program. Manny Ramírez [rah-MEE-rez], born Manuel Arístides Ramírez (May 30, 1972 in Santo Domingo, Dominican Republic), nicknamed "Manny", is an outfielder in Major League Baseball who plays for the Boston Red Sox (since 2001). It is said that he prevented one Roman attack on Syracuse by using a large array of mirrors (speculated to have been highly polished shields) to reflect sunlight onto the attacking ships causing them to catch fire. He was featured on the cover of the Electronic Arts Sports electronic game MVP Baseball 2005 [1]. One of his inventions used for military defense of Syracuse against the invading Romans was the claw of Archimedes. Ramírez appealed to fans by joining the 2004 Red Sox tradition of growing a unique hairstyle, maintaining a solid set of dreadlocks throughout the season. He has also been credited with the possible invention of the odometer during the First Punic War. 20 grand slams - 1st and 2nd.

He is reputed to have held the Romans at bay with war machines of his own design; to have been able to move a full-size ship complete with crew and cargo by pulling a single rope; to have discovered the principles of density and buoyancy, also known as Archimedes' principle, while taking a bath (thereupon taking to the streets naked calling "eureka" - "I have found it!"); and to have invented the irrigation device known as Archimedes' screw. 129 intentional walks - 12th and 56th. Archimedes became a popular figure as a result of his involvement in the defense of Syracuse against the Roman siege in the First and Second Punic Wars. 1.010 OPS - 3rd and 9th. . 785 extra base hits - 18th and 89th. He is considered by some math historians to be one of history's greatest mathematicians, along with possibly Newton, Gauss and Euler. .599 slugging average - 3rd and 8th.

Archimedes (Greek: ΑΡΧΙΜΗΔΗΣ) (287 BC–212 BC) was an Ancient mathematician, physicist, engineer, astronomer and philosopher born in the Greek seaport colony of Syracuse. .411 on base percentage - 9th and 35th. The Acorn Archimedes. 1270 RBI - 12th and 98th. Asteroid 3600 Archimedes, named in his honour. 410 home runs - 9th and 38th. Archimedes crater on the Moon. .316 batting average - 4th and 69th.

Given Archimedes's prodigious output as an engineer, Plutarch's often quoted comments on him seem hard to believe by modern historians. Career rankings among active players and on the All-Time lists

    . It has also been suggested that this statement merely reflects the prejudices of Plutarch and his peers, influenced by Platonic beliefs in pure reasoning and deduction over experimentation and inductive processes. 4-time Top 10 AL in times on base (1997, 1999, 2003-04). "...but regarding the work of an engineer and every art that ministers the needs of life as ignoble and vulgar, he devoted his earnest efforts only to those studies the subtlety and charm of which are not affected by the claims of necessity." Plutarch, possibly explaining why Archimedes produced no writings that describe precisely the design of his inventions. 4-time Top 10 AL hitters (1997, 1999-2000, 2003). 95)1. 5-time Top 10 AL in RBI (1995, 1998, 2000-01, 2004).

    "Perhaps the best indication of what Archimedes truly loved most is his request that his tombstone include a cylinder circumscribing a sphere, accompanied by the inscription of his amazing theorem that the sphere is exactly two-thirds of the circumscribing cylinder in both surface area and volume!" (Laubenbacher and Pengelley, p. 7-time Top 10 AL in home runs (1998-2004). "The Method". 7-time Top 10 AL MVP (1998-2004). The Sand Reckoner. 8-time Top 10 AL in total bases (1996-99, 2001-04). Archimedes' Cattle Problem. Twice led AL in intentional walks (2001, 2003).

    Stomachion. Twice led AL in on base percentage (2002-03). The Quadrature of the Parabola. 3-time led AL in OPS (1999-2000, 2004). On Floating Bodies (2 volumes). 3-time led AL in slugging percentage (1999-2000, 2004). On Conoids and Spheroids. Led AL in RBI (1999).

    On the Sphere and The Cylinder. Led AL in home runs (2004). On Spirals. Won American League batting crown (2002, .349). On the Equilibrium of Planes (2 volumes). 7-time Silver Slugger Award (1995, 1999-2004). 2-time Hank Aaron Award (1999, 2004).

    World Series MVP Award (2004). 9-time All-Star (1995, 1998-2005). The trade deadline behind him, Ramírez began his new life with the Red Sox with a go-ahead, pinch-hit single in the eighth inning, thrilling the Fenway Park crowd that thought he might be traded and giving Boston a 4-3 victory over the Minnesota Twins. As the trade deadline approached, the Red Sox discussed a three-team trade with the Tampa Bay Devil Rays and New York Mets, but a deal was not reached before the trading deadline.

    July 31: Although he is one of the most productive batters in major league history, Ramírez has been on the trading block every year as the Red Sox try to unload the remainder of his $160 million, eight-year contract, often at Ramirez's behest. Only Lou Gehrig, with 23, has hit more grand slams than Ramírez. July 5: Hit his 20th career grand slam —and his third of the season— off Chris Young of the Texas Rangers. Ramírez is one of only 39 other baseball players to ever hit this many home runs.

    May 16: Reached a major career milestone by hitting his 400th home run off Gil Meche of the Seattle Mariners.