Al-Karaji was an engineer and mathematician of the highest calibre. His enduring contributions to the field of mathematics and engineering are still recognized today in the form of the table of binomial coefficients, its formation law: :<math> {n choose mn-1 choose m-1} + {n-1 choose m} </math> and the expansion: :<math>(a+b)^n=sum_{k=0}^n{n choose k}a^kb^{n-k}</math> for integer n. Al-Karaji wrote about the work of earlier mathematicians, … Wikipedia
The definitive Wikipedia entry for Al-Karaji. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Al-Karaji
