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The ancient Greeks had no symbol for zero (μηδέν), and did not use a digit placeholder for it.They seemed unsure about the status of zero as a number.1170–1250), who grew up in North Africa and is credited with introducing the decimal system to Europe, used the term zephyrum.This became zefiro in Italian, and was then contracted to zero in Venetian.When division produced zero as a remainder, nihil, also meaning "nothing", was used.These medieval zeros were used by all future medieval calculators of Easter.Because it was used alone, not just as a placeholder, this Hellenistic zero was perhaps the earliest documented use of a numeral representing zero in the Old World.
Zero is represented by the absence of a knot in the appropriate position.
The paradoxes of Zeno of Elea depend in large part on the uncertain interpretation of zero.
By 130 AD, Ptolemy, influenced by Hipparchus and the Babylonians, was using a symbol for zero (a small circle with a long overbar) in his work on mathematical astronomy called the Syntaxis Mathematica, also known as the Almagest.
The Italian word zefiro was already in existence (meaning "west wind" from Latin and Greek zephyrus) and may have influenced the spelling when transcribing Arabic ṣifr.
There are different words used for the number or concept of zero depending on the context.
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The way in which it is used can be seen in his table of chords in that book.