One of his older texts that he wrote had been lost, it was call Di minor guisa written about commercial arithmetic. Book X was also lost it was about Euclid's Elements, in the book was a numerical treatment of irrational numbers the Euclid approached from geometric point of view.
During the time Europe had little interest in scholars, which would have made Fibonacci being ignored by most. But on the contrary there was much interest in his work, thus making him important. Being a contemporary of Jordanus , he was a sophisticated mathematician who was clearly recognized by his many achievements. Fibonacci was famous for his practical applications not for his abstract theorems.
Crowned King of Germany in 1212, the Holy Roman Emperor Frederick the Second was later crowned Holy Roman Emperor by the Pope in St. Peter's Church ( in Rome) in November 1220. Through his scholars Frederick was told about Gibonacci. Mickael Scotus was the court astrologer; Theororus was the courts philosopher and Dominicus Hispanus who hinted Frederick that he should meet Fibonacci in Pisa when the court was to meet next in the year 1225.
Jahannes of Palermo, who is a member of Frederick's court, gave Fibonacci a test to challenge his abilities as a mathematician. He solved three problems giving his answers in Flos, and then sent them to Frederick. In 1240 the Repulic of Pisa that gave a salary to found a degree: " The serious and learned Master Leonardo Bigollo" Fibonacci was given this salary for his services and advise on accounting and teaching the citizens.
In 1202, Fibonacci returned to Italy and dedicated Liber abaci to Scotus. The book was written about arithmetic and algebra based on information Fibonacci found on his travels. The widely copied book introduced the Hindu-Arabic placid-valued decimal system and the use of Arabic numerals into Euope. The book was mainly about the use of Arabic numberals, later being known as algorism, also studied in simultaneous linear equations.
Leonardo Pisano is better known by his nickname, Fibonacci. ... All of these are fibonacci numbers. ... You will see that these two numbers are neighbors in the Fibonacci series. ... Pine cones also show the Fibonacci Spirals clearly. ... Notice that 2, 3 and 5 are consecutive Fibonacci numbers. ...
