Re: [math-fun] Does this define sin(z)?

It was <= (less-than-or-equal). Tom Keith F. Lynch writes:

Bill Gosper <billgosper@gmail.com> wrote:

...

2) |sin(x) - sin(y)| ? |x - y| and

The digest option of this list turns all non-ASCII characters into question marks. I have no idea what was intended to go there, so I can make no sense of the question.