th / 0610043 SWAT-06-473 The No-Triangle Hypothesis for N = 8

We study the perturbative expansion of N = 8 supergravity in four dimensions from the viewpoint of the " no-triangle " hypothesis, which states that one-loop graviton amplitudes in N = 8 supergravity only contain scalar box integral functions. Our computations constitute a direct proof at six-points and support the no-triangle conjecture for seven-point amplitudes and beyond.