def get_lowercase_builtin_map(builtin_map_capitalised_dict):
    """Convert the names of the supported built-in operations to lowercase
    for comparison and invoke generation purpose. """
    builtin_map_dict = {}
    for fortran_name in builtin_map_capitalised_dict:
        python_name = builtin_map_capitalised_dict[fortran_name]
        builtin_map_dict[fortran_name.lower()] = python_name
    return builtin_map_dict
