Decimal the Roman numerals did, an intermediate base of 5. Notably, the polymath Archimedes (ca. 287–212 BC) invented a decimal positional system in his Sand Reckoner which was based on 10 and later led the German mathematician Carl Friedrich Gauss to lament what heights science would have already reached in his days if Archimedes had fully realized the potential of his ingenious discovery. The Hittites hieroglyphs (since 15th century BC), just like the Egyptian and early numerals in Greece, was strictly decimal. Some non-mathematical ancient texts like the Vedas dating back to 1900–1700 BCE make use of decimals and mathematical decimal
Decimal separator an Arabic decimal separator () (in hex U+066B) in Unicode. An Arabic thousands separator () also exists. In Persian, the decimal separator is called "momayyez", which is written like a forward slash—there is a small difference between the "upside-down (Persian) comma" character used in sentences and the "Latin" comma () (in hex U+066B) used to separate sequences of three digits. To separate sequences of three digits, a Latin comma or blank space may be used; however this is not a standard. In English Braille, the decimal point, , is distinct from both the comma, , and the full stop, .