bellbind

// Complex type
var Complex = function (real, imag) {
    if (real instanceof Complex) return real;
    imag = imag || 0;
    return Object.freeze(Object.create(Complex.prototype, {
        real: {value: real, enumerable: true},
        imag: {value: imag, enumerable: true},
    }));
};
Complex.fromPolar = function (r, theta) {