def hessian(self, params):
        return approx_hess_cs(params, self.loglike, args=(False,))
Test several edge cases related to min/max bin, and rounding.
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tsa/arima_model.py/ARMA.hessian--crossover with--dataset/ETHPy150Open NervanaSystems/neon/neon/backends/tests/test_hist.py/test_edge_cases