def METHOD_NAME(z: complex, allow_negative: bool = False) -> str:
    fmt_re = FMT_COMPLEX_NEG if allow_negative else FMT_COMPLEX
    re = SITools.Value(z.real, fmt=fmt_re)
    im = SITools.Value(abs(z.imag), fmt=FMT_COMPLEX)
    return f"{re}{'-' if z.imag < 0 else '+'}j{im} " "\N{OHM SIGN}"