Alexandria

Eratosthenes and the Circumference of the Earth

Eratosthenes and the Circumference of the Earth

Eratosthenes of Cyrene was a Greek mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria. He invented the discipline of geography, including the terminology used today. He is best known for being the first person to calculate the circumference of the Earth. The son of Aglaos, Eratosthenes was born in 276 BC in Cyrene. Now part of modern-day Libya,…
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Diophantos of Alexandria – the father of Algebra

Diophantos of Alexandria – the father of Algebra

Probably sometime between AD 201 and 215, Alexandrian Greek mathematician Diophantos of Alexandria was born. He is often referred to as the father of algebra. He is the author of a series of books called Arithmetica, many of which are now lost, which deal with solving algebraic equations. Diophantus was the first Greek mathematician who recognized fractions as numbers; thus he allowed positive rational numbers for the coefficients and solutions. The name…
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Heron of Alexandria and his Experiments

Heron of Alexandria and his Experiments

Heron of Alexandria was a Greek mathematician and engineer who was active in his native city of Alexandria, Roman Egypt in the first century AD. He is considered the greatest experimenter of antiquity. Among his most famous inventions was a windwheel, constituting the earliest instance of wind harnessing on land, as well as the well recognized description of a steam-powered device called an aeolipile. A major difficulty regarding Heron was to establish…
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