- Born on c. 780 and died c. 850. Lived in Baghad.
- A muslim mathematician and astronomer.
- His book "The Compendious Book on Calculation by Completion and Balancing" was translated to latin in the 12th century.
- The term Algebra, "a compilation of rules, together with demonstrations, for finding solutions of linear and quadratic equations based on intuitive geometric arguments, rather than the abstract notation now associated with the subject"(Log in), comes from this book.
- It also contains geometry aspects.
- "Elements within the work can be traced from Babylonian mathematics of the early 2nd millennium bce through Hellenistic, Hebrew, and Hindu treatises"(Log in).
- His second book was "Algoritmi de numero Indorum", in which he introduced Hindu-Arabic numerals, and arithmetic.
- The third book was the “The Image of the Earth”, translated as Geography. It included the coordinates of localities, and assisted in the construction of a world map.
- Babylonian scribes introduced a new numeral system, developed computational methods, solved linear and quadratic problems, using methods similar like the now used algebra.
- They study what now is called Pythagorean number triples.
- The scribes made clay tablets, which is now the evidence of their work.
- They solved quadratic problems "in terms of a single unknown"(Log in). Almost the same method we use today.
- Babylonian scribes did their works in terms of particular cases, not general formulas. They use sequential procedures instead of formulas.
The babylonians number system was around the number 60, this means that they grouped numbers into 60s. Today we use 10s instead of 60s. At first they didn't have a zero, which made things difficult. And even when they devised a zero they didn't had a decimal point which complicated things. They use symbols to represent numbers, and then fractions.