Iran marks National Day of Omar Khayyam; Persian poet, polymath
https://ift.tt/eA8V8J
... and astronomer and he did write several works including Problems of Arithmetic, a book on music and one on algebra before he was 25 years old.
from Algebra
... and astronomer and he did write several works including Problems of Arithmetic, a book on music and one on algebra before he was 25 years old.
from Algebra
