# How Did Early Mathematics Evolve

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Figure 1. The so-called Plimpton 322 tablet used to calculate different Pythagorean triples.

Mathematics today profoundly affects our societies and has had a lasting impact on science and technology. However, before Greek mathematicians developed many wonderful achievements in this area, what are the origins of mathematics and how did this field evolve in its early history?

## The Early Origins

While it is clear that early arithmetic developed in early prehistoric periods of human societies, more complex mathematics have developed via many different routes. Perhaps one of the most significant contributors to mathematics was the development of agriculture and cities. With the rise of these two factors, societies increasingly needed to calculate division of property, sharing of resources, accrual of wealth, and track the motion of the planets and stars, which all required more complex mathematical developments.

Most likely, the oldest documents that are mathematical in nature generally deal with accounting, which developed when writing first develops in the late 4th millennium BC in ancient southern Mesopotamia (now southern Iraq). By the 3rd millennium BC, calculations for interest, loans, and division of goods seem to be common among the Sumerians, who lived in southern Mesopotamia.  This included dividing field property and determining dimensions of land. In fact, this aspect of property division, related to agricultural land, created more complex problems such as determining the area of a triangle or calculating what the dimensions should be for given sides of a triangle. Because of this, we know by about 2000 BC, but likely earlier, the Pythagorean theorem had been invented, nearly 1500 years before Pythagoras, the man who has given his name to the theorem, was born. This innovation of the Pythagorean theorem seems to have happened both in Mesopotamia and Egypt (Figure 1).

The Egyptians had also developed by the 3rd millennium BC a base 10 numeration system. By around 1650 BC, Egyptian mathematicians had developed a system of binary numbers, while also being able to determine prime numbers and calculations for arithmetic, geometric, and harmonic means (Figure 2). Both Egyptian and Mesopotamian sources indicate a system for developing fractions and providing their notation. Figure 2. This is the Rhind papyrus, which enabled insights into Egyptian mathematics and concepts such as binary numbers, prime number, and calculations for arithmetic, geometric and harmonic mean

The Mesopotamian system of mathematics was also sexagesimal, or based on the division of 60. While this may seem an odd division-based system, the numeric system is very convenient for calculation of coordinates or rotation in a circle (e.g., 360 degrees is easily divided by 60). The divisions of time we use today (i.e., 60 seconds, minutes, etc.) derive from this Mesopotamian system. Additionally, we know that by the early 2nd millennium BC, estimates for π (3.125 estimated by the Babylonians) existed and the Babylonians, who lived in southern Mesopotamia and succeeded the Sumerians, understood how to measure volume and area in circular objects.

Other mathematical principles already understood by the early 2nd millennium BC were concepts of square roots/powers, inverse numbers, quadratic equations, exponential growth, a form of Fourier analysis, and other types of calculation used in geometry and algebra. Concepts of zero were also well understood by the early 2nd millennium and were represented as a space or symbol in Mesopotamia and Egypt respective. Very recently, a paper was published that showed the Babylonians had already developed an early forerunner of calculus, by around 2000 BC using abstract mathematics for estimating distances plants travel in space. Previously, some of the forms of Mesopotamian calculations used for complex shapes and distances were assumed not to have been invented until the 14th century AD. ## The Role of Astronomy

What was key to the development of sophisticated calculations such as quadratic equations or forms of Fourier analyses was Astronomy. The Babylonians, in part out of religious devotion and need to observe the movement of the planets and stars, developed many sophisticated calculations to predict where and when plants and stars would be, including the timing of eclipses. The need to develop complex calculations to track orbits of celestial objects necessitated the need to develop far more sophisticated analyses that eventually became the foundation of modern day calculus. In fact, by approximately 300 BC, Babylonian mathematicians had developed sophisticated techniques in calculating distance and time together for estimating the movement of celestial objects.

## Other Developments

Sometime by the 1st millennium BC, Chinese mathematicians began using negative numbers. This seems to have been used to calculate taxes or other monetary values. In fact, we know from Leibniz, who was one of the developers of calculus, that ancient Chinese mathematicians had developed a binary numeric system that influenced his own development of binary calculus. The system of the Chinese, in effect, influences our own use of binary calculus. Developments in India include a decimal systems that became the foundation of our own decimal system used today. Additionally, many other similar achievements noted for Egypt and Mesopotamia, such as in geometry, algebra, and trigonometry, have also been found in India and China.

## Summary

What is clear is long before major contributions by Greek mathematicians, we see numerous contributions by Egyptian, Mesopotamian, Chinese, and Indians sources unfolding. These contributions were critical for later mathematics and sciences, enabling such fields as modern cartography, prediction of celestial movements, calculations of areas and volumes, and creation of accurate time measurements and calendars. In some cases, such as the early forerunners to calculus, have been entirely unexpected discoveries that have forced our re-evaluation of what people knew sometimes thousands of years before techniques were though to have developed. This shows that many mathematical discoveries were likely made and may have been forgotten before their rediscovery in Classical or Renaissance works. However, foundations of our own mathematics and sciences can be now certainly traced back to far older sources. Given the large volume of unpublished ancient texts, it is highly likely even more discoveries and surprises in mathematical sciences wait.