AD 600

History of zero

Gradual emergence of decimal positional notation with a zero sign in South Asia

The supposed invention in 550 has no inventor, no surviving document, and no identifiable day.

Why 550 does not work

No consulted source identifies an invention, a named mathematician, or a discrete event in 550 CE. The surviving evidence indicates a gradual transition around 600 from additive Brahmi-derived numerals to decimal place-value notation using nine digits and a zero placeholder.

Aryabhata's system, composed around 499, was positional but used no written zero numeral — he could encode enormous numbers positionally without drawing a zero at all — so it cannot supply the claimed event either.

Three different things called 'zero'

A zero placeholder, a written zero glyph, and zero treated as a number are distinct developments that cannot safely be collapsed into one invention date. Brahmagupta's Brahmasphutasiddhanta of 628 belongs to the third of these, setting out explicit arithmetic involving zero.

The dated inscriptions tell their own story: a dot-zero appears in a Khmer inscription from Sambor in 683, and circular zeroes appear at Gwalior in 876.

Why the Bakhshali manuscript has no single secure date

The Bakhshali manuscript contains written dot-zeroes, but its dating is contested. Specialists argue that the earliest radiocarbon-dated folio cannot stand for the whole manuscript, and that the latest folio constrains when the scribal production happened.

Radiocarbon dates measure separate pieces of birch bark rather than the moment a mathematical text was composed or copied — which is why the hunt for the 'first zero' keeps turning into a debate about what exactly was dated.

Sources

Researched 23 Aug 2026 7 sources 3 audit passes Date disputed

How this was checked

Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →

Date disputed. Sources disagree; the research places it at ~0600.

What the sources leave uncertain

The listed year 550 is unsupported; modern scholarship generally describes the epigraphic transition as beginning around 600 or in the sixth–seventh centuries.
Radiocarbon dates measure separate pieces of birch bark, not necessarily the date when the mathematical text was composed or copied. Specialists reject assigning the whole Bakhshali manuscript the date of its earliest sampled folio.
A zero placeholder, a written zero glyph, and zero treated as a number are distinct developments and cannot safely be assigned one invention date.