In some articles, we write "non-negative real number". Why we don't simply say "positive real number" ?
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3Non-negative: $x \geq 0$. Positive: $x > 0$. Non-negative is slightly shorter than "positive or zero". – Jose Avilez May 08 '22 at 15:33
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1$0$ is not positive and many times you want to include it. – jjagmath May 08 '22 at 15:35
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1In French, zero is included in the positive numbers, so sometimes they would have to say 'non-zero positive number'. – Empy2 May 08 '22 at 15:39
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1https://math.stackexchange.com/a/1740775 – 311411 May 08 '22 at 15:45