It is named Babylonian mathematics due to the central role of Babylon as a place of study. In 1931, Kurt Gödel found that this was not the case for the natural numbers plus both addition and multiplication; this system, known as Peano arithmetic, was in fact incompletable. , Babylonian mathematics were written using a sexagesimal (base-60) numeral system. , The oldest extant mathematical records from India are the Sulba Sutras (dated variously between the 8th century BC and the 2nd century AD), appendices to religious texts which give simple rules for constructing altars of various shapes, such as squares, rectangles, parallelograms, and others. , Following a period of stagnation after Ptolemy, the period between 250 and 350 AD is sometimes referred to as the "Silver Age" of Greek mathematics. Guy Beaujouan, "The Transformation of the Quadrivium", pp. As in China, there is a lack of continuity in Indian mathematics; significant advances are separated by long periods of inactivity. Several centuries later, the Muslim mathematician Abu Rayhan Biruni described the Aryabhatiya as a "mix of common pebbles and costly crystals".  As with Egypt, the preoccupation with temple functions points to an origin of mathematics in religious ritual. As in most areas of study, the explosion of knowledge in the scientific age has led to specialization: by the end of the century there were hundreds of specialized areas in mathematics and the Mathematics Subject Classification was dozens of pages long. Besides this compilation, which includes more than ten books, Euclid wrote the following: Thales of Miletus was a philosopher, mathematician, and astronomer, as well as the founder of the Milesian school. 14th century – Madhava is considered the father of mathematical analysis, who also worked on the power series for π and for sine and cosine functions, and along with other Kerala school mathematicians, founded the important concepts of calculus. Also, for the first time, the limits of mathematics were explored. These texts became the basis for the current thinking in mathematics education. Thales of Miletus became famous for predicting a solar eclipse.  The Mayas used mathematics to create the Maya calendar as well as to predict astronomical phenomena in their native Maya astronomy. The 19th century saw the beginning of a great deal of abstract algebra. , Greek mathematics refers to the mathematics written in the Greek language from the time of Thales of Miletus (~600 BC) to the closure of the Academy of Athens in 529 AD. New York: McGraw-Hil. Archimedes also invented rock-throwing catapults and The Claw of Archimedes. The remaining 4 are too loosely formulated to be stated as solved or not. All surviving records of pre-Greek mathematics show the use of inductive reasoning, that is, repeated observations used to establish rules of thumb. , In the 14th century, Madhava of Sangamagrama, the founder of the so-called Kerala School of Mathematics, found the Madhava–Leibniz series and obtained from it a transformed series, whose first 21 terms he used to compute the value of π as 3.14159265359. Beginning in Renaissance Italy in the 15th century, new mathematical developments, interacting with new scientific discoveries, were made at an increasing pace that continues through the present day. , At roughly the same time, the Han Chinese and the Romans both invented the wheeled odometer device for measuring distances traveled, the Roman model first described by the Roman civil engineer and architect Vitruvius (c. 80 BC – c. 15 BC).  The Precious Mirror also contains a diagram of Pascal's triangle with coefficients of binomial expansions through the eighth power, though both appear in Chinese works as early as 1100. One driving element was the belief that mathematics provided the key to understanding the created order of nature, frequently justified by Plato's Timaeus and the biblical passage (in the Book of Wisdom) that God had ordered all things in measure, and number, and weight.