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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def convex_conj(self):
 """Convex conjugate of the nuclear norm. The convex conjugate is the indicator function on the unit ball of the dual norm where the dual norm is obtained by taking the conjugate exponent of both the outer and singular vector exponents. """

        return IndicatorNuclearNormUnitBall(
            self.domain,
            conj_exponent(self.outernorm.exponent),
            conj_exponent(self.pwisenorm.exponent))