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Yes, technically putting a “0” instead of letting the place empty is included in “changing the appearance a little bit”, but your comment pre-edit undersells the innovation.

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gandalf_der_12te@discuss.tchncs.de ⁨3⁩ ⁨hours⁩ ago
i thought the indians already put a dot in place to denote zero?

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From the wikipedia page: en.wikipedia.org/wiki/Numeral_system

Indian mathematicians, such as Brahmagupta in the 7th century, played a crucial role in formalizing arithmetic rules and the concept of zero, which was later refined by scholars like Al-Khwarizmi in the Islamic world.

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