18.5 CharFFE

CharFFE( z ) or CharFFE( vec ) or CharFFE( mat )

CharFFE returns the characteristic of the finite field F containing the element z, respectively all elements of the vector vec over a finite field (see Vectors), or matrix mat over a finite field (see Matrices).

    gap> CharFFE( Z(16)^7 );
    2
    gap> CharFFE( Z(16)^5 );
    2
    gap> CharFFE( [ Z(3), Z(27)^11, Z(9)^3 ] );
    3
    gap> CharFFE( [ [ Z(5), Z(125)^3 ], [ Z(625)^13, Z(5) ] ] );
    Error, CharFFE: <z> must be a finite field element, vector, or matrix
    # The smallest finite field which contains all four of these elements
    # is too large for {\GAP} 

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