def sym(v):
    """
    Returns that linear combination of basis vector symbols which corresponds
    to vector v, itself a linear combination of basis vectors.
    """
    # Obtain the coefficients in basis vector expansion of `v`.
    # Then construct and return corresponding basis vector symbol expansion.
    coefs = v.blade_coefs(v.Ga.mv())  
    return sum(coefs[j]*v.Ga.basis[j] for j in range(v.Ga.n))