def approxChiFunction(dim):
    dim = float(dim)
    return sqrt(dim) * (1 - 1 / (4 * dim) + 1 / (21 * dim ** 2))
Create square identity matrix n x n
dataset/ETHPy150Open pybrain/pybrain/pybrain/tools/functions.py/approxChiFunction--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/matrices/dense.py/eye