def basic_root(self, i, j):

        n = self.n
        root = [0]*n
        root[i] = 1
        root[j] = -1
        return root
Generate roots with 1 in ith position and -1 in jth postion
dataset/ETHPy150Open sympy/sympy/sympy/liealgebras/type_f.py/TypeF.basic_root