In the 7th century, the Arabs conquered the neighboring nationalities and established the Saracen Empire, starting from India in the east and reaching Spain in Africa in the west. Later, this Islamic country split into two countries, East and West. At that time, the capitals of the two countries were very prosperous, especially Baghdad, the capital of the East, which brought together western Greek culture and eastern Indian culture.
In the third century BC, the ancient Indians finally invented the number symbol 1 to 9, but there was no "0" at this time. The appearance of "0" was in the Gupta dynasty of India more than 1 0/000 years after the invention of the digital symbol19. When it first appeared, it was not a circle, but a dot.
Extended data
Around 500 A.D., with the rise and development of economy and caste system, Punjab in the northwest of Indian subcontinent has been in a leading position in mathematics. Astronomer Ayepihite made a new breakthrough in simplifying numbers: he recorded the numbers with a grid. If there is a symbol in the first grid, such as a point representing 1, then the same point in the second grid represents ten.
The point in the third column represents 100. In this way, not only the digital symbols themselves, but also their position order is of great significance. Later, Indian scholars introduced the symbol zero. It can be said that these symbols and representations are the old ancestors of Arabic numerals.