## What did Qin Jiushao do?

1261, Meizhou [modern Meixian, Guangdong province]), Chinese mathematician who developed a method of solving simultaneous linear congruences. In 1219 Qin joined the army as captain of a territorial volunteer unit and helped quash a local rebellion.

**What were some of Qin Jiushao contributions to mathematics?**

Among his accomplishments are the introduction techniques for solving certain types of algebraic equations using a numerical algorithm (equivalent to the 19th century Horner’s method) and for finding sums of arithmetic series. He also introduced the use of the zero symbol into written Chinese mathematics.

### Where was Qin Jiushao from?

Pu PrefectureQin Jiushao / Place of birthPuzhou or Pu Prefecture was a zhou in imperial China, centering on modern Anyue County, Sichuan, China. It existed from 575 until 1376. Wikipedia

**What is Liu Hui famous for?**

Liu Hui was a Chinese mathematician who wrote a commentary of the Nine Chapters on the Mathematical Art.

## What is the meaning of Q in mathematics?

Q= rational numbers ( numbers written as ratio) N = Natural numbers (all positive integers starting from 1. (

**Where was Liu Hui?**

Liu Hui, (flourished c. 263 ce, China), Chinese mathematician. All that is known about the life of Liu Hui is that he lived in the northern Wei kingdom (see Three Kingdoms) during the 3rd century ce.

### Did the Chinese discover pi?

Liu Hui was the first Chinese mathematician to provide a rigorous algorithm for calculation of π to any accuracy. Later he invented an ingenious quick method to improve on it, and obtained π ≈ 3.1416 with only a 96-gon, with an accuracy comparable to that from a 1536-gon.

**What does Z+ mean in math?**

all positive integers

Z+ is the set of all positive integers (1, 2, 3.), while Z- is the set of all negative integers (…, -3, -2, -1). Zero is not included in either of these sets . Znonneg is the set of all positive integers including 0, while Znonpos is the set of all negative integers including 0.

## How did Liu Hui calculate pi?

Liu Hui was the first Chinese mathematician to provide a rigorous algorithm for calculation of π to any accuracy. Liu Hui’s own calculation with a 96-gon provided an accuracy of five digits: π ≈ 3.1416. His most important contribution in this area was his simple iterative π algorithm.