Important Indians/Arabians/Contemporarian-ishs.

Question 1

Brahmaguptra

Answer 1

Indian Mathematics; wrote a book that contained all the math known at that time.

Question 2

Al-Khowarizmi

Answer 2

His era believed that areas and volumes had to be non-negative.
Also that one couldn’t add an area to a volume.
Wrote two really important books!
1) Thus Says Algorithmi
2) All About Al-Gebra Al Mutada

Question 3

Al-Khowarizmi: Thus Says Algorithmi

Answer 3

Book that collected everything we know in arithmetic.

We get “algorithm” from this.

Question 4

Al-Khowarizmi: All About Al-Gebra Al Mutada

Answer 4

Book on how to solve linear and quadratic systems of equations.

Question 5

Al Khayammi (Omar Kayam) 1000AD

Answer 5

Solved the cubic equation!
(13 times, because he wasn’t allowed negative numbers)
(think cubic)

Question 6

Al Samawal

Answer 6

(Jewish)
Huge departure from geometric thinking!
Studied polynomials of all order (including negatives).
Did algebra with negative numbers.
(think Samuel from biblical times, big change)

Question 7

Al Baghdadi

Answer 7

Philosophically interesting.

Proved that for every two rational numbers, there’s an irrational one in between.