Hipaso de Metaponto was a 6th century BC Greek mathematician and philosopher born in Metaponto, Italy who was a member of Pythagoras' school. He is believed to have discovered irrational numbers, contradicting the Pythagorean belief that all things were rational, and was expelled from the school as a result. The circumstances of his later death are uncertain but may have involved a shipwreck, suicide, or murder by Pythagoreans.

1. Hipaso de Metaponto

2. His life: -Hipaso de Metaponto was a mathematician, philosopher and music theorist. He was member of the Pythagoras´ school.

3. His life: -He was born in the year 500 B.C at Metaponto, a Greek city located in the Tarento´s gulf, in the south of Italia.

4. Discoverings: -The building of a dodecahedron inside a sphere.

5. Discoverings: -The incommensurability.

6. Discoverings: -People think he discovered the existence of the irrational numbers when Pythagoreans thought everything was based on rational numbers and because of that, he was expelled of the school.

7. curiosities -There are different hypothesis about his death: he died in a shipwreck, he commited a suicide or the Pythagoreans killed him.

8. Curiosities -Metaponto´s character appears in a short-movie about the origins of the number FI and about his precense on the nature.