1. Leonardo Pisano Fibonacci

2. Childhood
 It is believed that Leonardo Pisano Fibonacci was
born in the 13th century, in 1170. Fibonacci was born
in Italy but obtained his education in North Africa.
Very little is known about him or his family and
there are no photographs or drawings of him. Much
of the information about Fibonacci has been
gathered by his autobiographical notes which he
included in his books.

3. Accomplishments
 Fibonacci is considered to be one of the most
talented mathematicians for the Middle Ages.
 Few people realize that it was Fibonacci that gave us
our decimal number system, which was replaced by
Roman Numeral system as times advanced.

4. Liber abaci
 Liber abaci is his book were he shows how to use our
current numbering system all from what he
discovered.
 Here is an example problem form his book :A
certain man put a pair of rabbits in a place
surrounded on all sides by a wall. How many pairs
of rabbits can be produced from that pair in a year
if it is supposed that every month each pair begets a
new pair, which from the second month on becomes
productive?

5. Liber abaci continued
 The problem that you just read was the problem that lead
to this following discovery of the introduction of the
Fibonacci Numbers the Fibonacci Sequence.
 The sequence is 1, 1, 2, 3, 5, 8, 13, 21, 34, 55... This
sequence, shows that each number is the sum of the two
preceding numbers. It is a sequence that is seen and used
in many different areas of mathematics and science. The
sequence is an example of a recursive sequence. The
Fibonacci Sequence defines the curvature of naturally
occurring spirals, such as snail shells and even the
pattern of seeds in flowering plants.

6. Contributions
 Fibonacci is famous for his contributions to number
theory.
 In his book, Liber abaci he introduced the Hindu-
Arabic place-valued decimal system and the use of
Arabic numerals into Europe
 He introduced us to the bar we use in fractions,
previous to this, the numerator has quotations
around it.
 The square root notation is also a Fibonacci method.

7. Work Cited
 http://math.about.com/od/mathematicians/a/fibon
acci.htm