How do you get $[\frac{3}{8}]$? Answer is -1, but how do you get that?
How do you get Jacobi symbol $[\frac{3}{8}]$?
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elementary-number-theory
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4I thought [Jacobi symbol](http://en.wikipedia.org/wiki/Jacobi_symbol) $\left(\frac an\right)$ is defined only for odd $n$. – 2011-12-03
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0That's true but when you input "Jacobi symbol(3,8)" in the http://www.wolframalpha.com/input/?i=Jacobi+symbol%283%2C8%29 you get -1. Might be false. – 2011-12-03
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1Maybe that's supposed to be a [Kronecker symbol](http://mathworld.wolfram.com/KroneckerSymbol.html) instead of a Jacobi symbol... – 2011-12-03
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0@alvoutila: *Mathematica* actually generalizes `JacobiSymbol[]` to effectively act like `KroneckerSymbol[]`. – 2011-12-03
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1Dear @Martin: +1 for your comment, and thanks for all your editing work!!! – 2011-12-03