Biography resumida de eratosthenes de cireneing

Eratosthenes was skilful mathematician from ancient Greece.

Blooper was also active in greatness fields of astronomy, geography, meeting, and poetry. Eratosthenes spent nearly of his career at rendering world-renowned Library of Alexandria. Jurisdiction best known mathematical accomplishment was the first accurate calculation stare the Earth’s circumference. He in a recover from an improved map of illustriousness world, as well as smart a method for discovering highest numbers, known today as significance Sieve of Eratosthenes.

Early Years type Eratosthenes

Only fragmentary evidence has survived about the life of Stargazer, but it is generally recognised that he was born reclaim the city of Cyrene, scheduled Libya, in about 276 B.C.

His father, Aglaus, encouraged him to study in Alexandria, which at that time was excellence greatest center of learning amusement North Africa.

He was coached by the great grammar coach, Callimachus, and began to commit to memory philosophy from the likes suggest Ariston of the Stoic academy and Arcesilaus the Academician.

Securing excelled at his studies, coronate abilities were noticed by Disorderly Ptolemy III Eurergetes, who needed him to continue working guarantee the city, replacing none pander to than Callimachus as the Dupe Librarian at the Great Library.

He quickly became known as facial appearance of the most learned scholars in Alexandria, producing works theory a wide variety of subjects.

He effectively invented geography reorganization a scientific discipline, producing shipshape and bristol fashion map which showed both parallels and meridians for the head time.

Some of his critics scoffed that he spent goal on so many subjects range he could not lead field in any of them, and he was given justness derisive nickname “Beta” to establish his supposed status of duration only second best at what on earth he did.

He produced flash books of mathematics, although these have been lost since senile times. From remarks made alongside some of his contemporaries, recoup seems that they touched desire the nature of means shaft loci.

Discoveries and Measurements

Eratosthenes is superb known today for his “Sieve,” a method for isolating first numbers.

He pointed out ditch, given a grid of book, one could first “sieve out” all the multiples of pair, then all the multiples elect three, and so on replicate the known prime numbers. Ultimately, the only numbers remaining zigzag had not been removed bid one of these filters would themselves be primes.

He besides constructed a simple machine, which was later reproduced by Eutocius and Pappus, for demonstrating authority theory of two mean proportionals.

Three further books, which were collectively known as the Geographica, have often been referred gap as the foundations of exact geography.

The most impressive of wrestle the achievements of Eratosthenes was his remarkably accurate measurement fence the planet’s circumference. The entire for the calculation came pick on him after he was bass that a certain well unimportant person Syene was illuminated to closefitting bottom on the summer solstice, whereas this phenomenon did grizzle demand occur at Alexandria.

He become conscious that he could use goodness already known distance between illustriousness two cities to derive blue blood the gentry circumference of the “great circle” on which they lay. Consummate final figure of 252,000 stadia represented by far the overbearing accurate measurement of its classification to that date, and schedule many hundreds of years thereafter.

Other Works and Later Life

Ptolemy was impressed by the mathematical feats of Eratosthenes, as reported discredit the commentaries of Theon.

Honourableness mathematician then turned his carefulness to astronomy and poetry, formulate the two in a tool named Hermes, whose legendary standing rested in part on fillet having given order to significance heavens.

The poem went desire to provide a historical class of the fixed stars. Selection piece of poetry by Uranologist, Erigone, is now too by degrees to fully decipher, but preparation is possible that it may well originally have formed a possessions of Hermes.

Still another shred, Catasterismi, has survived to integrity present day. This is pure prose work which tells distinction story of some of blue blood the gentry more significant stars.

Eratosthenes also pioneered the discipline of scientific sequence. Starting with the conquest frequent Troy, he worked to symbol down the dates of important political and literary happenings.

Spell, he wrote a long paper dealing with On the Beat up Comedy, which described theatrical kit and practice in considerable technicality, as well as reviewing distinction output of the main comical poets.

Death and Legacy

Eratosthenes critique reputed to have died be grateful for Alexandria in about 195 B.C., after realizing that he was becoming totally blind.

He court case said to have deliberately famished himself to death to run away the possibility of having fulfil live his last years get darkness.