9

In mathematics, the recurring decimal 0.999… , which is also written as or , denotes a real number equal to 1. In other words, "0.999…" represents the same number as the symbol "1". The equality has long been accepted by professional mathematicians and taught in textbooks. Various proofs of this identity have been formulated with varying rigour, preferred development of the real numbers, background assumptions, historical context, and target audience.
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9 (nine) is the natural number following 8 and preceding 10.
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Noun
1. the cardinal number that is the sum of eight and one
(synonym) nine, IX, niner, Nina from Carolina, ennead
(hypernym) digit, figure
Adjective
1. denoting a quantity consisting of one more than eight and one less than ten
(synonym) nine, ix
(similar) cardinal

= 9 (nine).
Ex: The main library, which has the one public entrance and exit, is open from 9:00 a.m.

9

B: (Kimia) kompleks koordinat-9
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