def gammainc(a, x): a, x = _promote_args_inexact("gammainc", a, x) return lax.igamma(a, x)
def cdf(x, p): x, p = _promote_args_inexact("gennorm.cdf", x, p) return .5 * (1 + lax.sign(x) * lax.igamma(1 / p, lax.abs(x)**p))