public LorentzVectorVariableU(Variable variable0, Variable variable1, Variable variable2, Variable variable3)
: base(variable0, variable1, variable2, variable3)
{
this.variables[0] = variable0;
this.variables[1] = variable1;
this.variables[2] = variable2;
this.variables[2] = variable3;
this.Del = new LorentzVectorOperatorL(new Derivative(variable0), new Derivative(variable1), new Derivative(variable2), new Derivative(variable3));
}
public EuclideanMatrix4 Curl(LorentzVectorOperatorL del)
{
return(new EuclideanMatrix4(MatrixUtilities.MatrixCrossProduct(i => del[i], i => this[i], (x, y) => x - y, (x, y) => x * y)));
}