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- Pietro_Cataldi abstract "Pietro Antonio Cataldi (15 April 1548, Bologna – 11 February 1626, Bologna) was an Italian mathematician. A citizen of Bologna, he taught mathematics and astronomy and also worked on military problems. His work included the development of continued fractions and a method for their representation. He was one of many mathematicians who attempted to prove Euclid's fifth postulate. Cataldi discovered the sixth and seventh primes later to acquire the designation Mersenne primes by 1588. His discovery of the 6th, that corresponding to p=17 in the formula Mp=2p-1, exploded a many-times repeated number-theoretical myth (Until Cataldi, 19 authors going back to Nicomachus are reported to have made the claim in L.E.Dickson's History of the Theory of Numbers—with a few more repeating this afterward) that the perfect numbers had units digits that invariably alternated between 6 and 8; and that of the 7th (for p=19) held the record for the largest known prime for almost two centuries, until Leonhard Euler discovered that 231 - 1 was the eighth Mersenne prime. Although Cataldi also claimed that p=23, 29, 31 and 37 all also generate Mersenne primes (and perfect numbers), his text's clear demonstration shows that he had genuinely established the fact through p=19.".
- Pietro_Cataldi birthDate "1548-04-15".
- Pietro_Cataldi birthYear "1548".
- Pietro_Cataldi deathDate "1626-02-11".
- Pietro_Cataldi deathYear "1626".
- Pietro_Cataldi viafId "74287465".
- Pietro_Cataldi wikiPageExternalLink cataldi.html.
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- Pietro_Cataldi dateOfBirth "1548-04-15".
- Pietro_Cataldi dateOfDeath "1626-02-11".
- Pietro_Cataldi hasPhotoCollection Pietro_Cataldi.
- Pietro_Cataldi name "Cataldi, Pietro Antonio".
- Pietro_Cataldi shortDescription "Italian mathematician".
- Pietro_Cataldi description "Italian mathematician".
- Pietro_Cataldi description "Italian mathematician".
- Pietro_Cataldi subject Category:1548_births.
- Pietro_Cataldi subject Category:1626_deaths.
- Pietro_Cataldi subject Category:16th-century_Italian_mathematicians.
- Pietro_Cataldi subject Category:17th-century_Italian_mathematicians.
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- Pietro_Cataldi comment "Pietro Antonio Cataldi (15 April 1548, Bologna – 11 February 1626, Bologna) was an Italian mathematician. A citizen of Bologna, he taught mathematics and astronomy and also worked on military problems. His work included the development of continued fractions and a method for their representation. He was one of many mathematicians who attempted to prove Euclid's fifth postulate. Cataldi discovered the sixth and seventh primes later to acquire the designation Mersenne primes by 1588.".
- Pietro_Cataldi label "Pietro Antonio Cataldi".
- Pietro_Cataldi label "Pietro Antonio Cataldi".
- Pietro_Cataldi label "Pietro Cataldi".
- Pietro_Cataldi label "Pietro Cataldi".
- Pietro_Cataldi label "Pietro Cataldi".
- Pietro_Cataldi label "Pietro Cataldi".
- Pietro_Cataldi label "Pietro Cataldi".
- Pietro_Cataldi label "Катальди, Пьетро Антонио".
- Pietro_Cataldi label "بييترو كاتالدي".
- Pietro_Cataldi sameAs Pietro_Cataldi.
- Pietro_Cataldi sameAs Pietro_Antonio_Cataldi.
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- Pietro_Cataldi givenName "Pietro Antonio".
- Pietro_Cataldi isPrimaryTopicOf Pietro_Cataldi.
- Pietro_Cataldi name "Cataldi, Pietro Antonio".
- Pietro_Cataldi name "Pietro Antonio Cataldi".
- Pietro_Cataldi surname "Cataldi".