what are their contribution in the field of math?
Three Han mathematical treatises still exist. These are the "Book on Numbers and Computation", the "Arithmetical Classic of the Gnomon and the Circular Paths of Heaven" and the "Nine Chapters on the Mathematical Art".
Han dynasty
Three Han mathematical treatises still exist. These are the "Book on Numbers and Computation", the "Arithmetical Classic of the Gnomon and the Circular Paths of Heaven" and the "Nine Chapters on the Mathematical Art". Han-era mathematical achievements include solving problems with right-angle triangles, square roots, cube roots, and matrix methods, finding more accurate approximations for pi, providing mathematical proof of the Pythagorean theorem, use of the decimal fraction, Gaussian elimination to solve linear equations, and continued fractions to find the roots of equations.

One of the Han's greatest mathematical advancements was the world's first use of negative numbers. Negative numbers first appeared in the "Nine Chapters on the Mathematical Art" as black counting rods, where positive numbers were represented by red counting rods. Negative numbers were also used by the Greek mathematician Diophantus around AD 275, and in the 7th-century Bakhshali manuscript of Gandhara, South A
who was valued in han society under the philosophy of confucianism Emperor Gaozu of Han. can you mention few names of people of the royal family? Emperor Zhao (r. 87–74 BCE) , Emperor Yuan (r. 48–33 BCE)  Emperor Cheng (33–7 BCE) ,  Emperor He (r. 88–105 CE) ,  Emperor Shun (r. 125–144 CE) , Emperor Ling (r. 168–189 CE). was there slavery in this dynasty? Yes, Slaves comprised roughly 1% of the population. who was the founder of this dynasty? Liu Bang. what religion did people follow in this dynasty? They formed large hierarchical religious societies called the Way of the Five Pecks of Rice. did they have their own army? Yes, every male commoner aged twenty-three was liable for conscription into the military. have they contributed anything in science and technological field? The Han dynasty was a period of development of premodern Chinese science and technology, comparable to the level of scientific and technological growth what did they use for writing? Bronzewares, animal bones, and bamboo slips or wooden boards. what was their monetary system? wuzhu coins is China's standard coin until the Tang dynasty and currencies. what types of taxes they used to pay? The land tax, poll tax, property taxes, reducing taxes, temporary remissions of taxes.
wiki:11582005
Han dynasty [SEP] Mathematics
Three Han mathematical treatises still exist. These are the "Book on Numbers and Computation", the "Arithmetical Classic of the Gnomon and the Circular Paths of Heaven" and the "Nine Chapters on the Mathematical Art". Han-era mathematical achievements include solving problems with right-angle triangles, square roots, cube roots, and matrix methods, finding more accurate approximations for pi, providing mathematical proof of the Pythagorean theorem, use of the decimal fraction, Gaussian elimination to solve linear equations, and continued fractions to find the roots of equations. One of the Han's greatest mathematical advancements was the world's first use of negative numbers. Negative numbers first appeared in the "Nine Chapters on the Mathematical Art" as black counting rods, where positive numbers were represented by red counting rods.