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 KASH3 Reference Manual
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Function

IsSquare ( elt-fld^fin x ) -> elt-alg^boo, elt-fld^fin

Optional Arguments

Resultselt-ord^rat1 <= Results <= 2

Description

True iff the element x of the the finite field F is the square of an element of F; if true, such an element is also returned.

Examples

x_gf7 := FiniteField(7); IsSquare(One(x_gf7)); IsSquare(Element(x_gf7,2));
x_gf7 := FiniteField(7); IsSquare(-One(x_gf7)); IsSquare(Element(x_gf7,3));
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