MathGroup Archive 2004

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What does +- mean?


Hi,

I have found (v. 5.0) an extrange thing: when one expands, e.g.,

Series[Sqrt[-1/2+x^2],{x,0,4}]

there appear a +- sign (which is correctly not present when one changes
-1/2 by -1)

is this a bug or a feature?

Thanks

L. Vergara





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