CoordinateNorm( code, coord )
CoordinateNorm
returns the norm of code with respect to
coordinate coord. If C_a = { c in code | c_{coord} = a },
then the norm of code with respect to coord is
defined as
max_v in GF(q)^n sum_a=1^q d(x,C_a),
with the convention that d(x,C_a) = n if C_a is empty.
gap> CoordinateNorm( HammingCode( 3, GF(2) ), 3 ); 3
GAP 3.4.4