| from mpmath import mp | |
| mp.dps = 110 | |
| def bloch_wigner_D(z): | |
| # Bloch-Wigner dilogarithm: | |
| # D(z) = Im(Li_2(z)) + arg(1-z)*log|z| | |
| return mp.im(mp.polylog(2, z)) + mp.arg(1 - z) * mp.log(abs(z)) | |
| def compute(): | |
| z = (mp.mpf(3) + 1j * mp.sqrt(7)) / 4 | |
| vol = mp.mpf(6) * bloch_wigner_D(z) | |
| return mp.re(vol) | |
| if __name__ == "__main__": | |
| print(str(compute())) |