Unum rebuttal

[Joseph via Digitalmars-d]

On Saturday, 16 September 2017 at 02:27:23 UTC, Timon Gehr wrote:
> On 15.09.2017 06:14, Joseph wrote:
>> ... How can be be taken seriously if
>> his rebuttle has basic mistakes and typos?
>> 
>
> :-)
>
>> https://people.eecs.berkeley.edu/~wkahan/EndErErs.pdf
>> page 5:
>> 
>> (y - sqrt(y^2 + 1)) - 1/(y + sqrt(y^2 + 1))
>> 
>> is not zero for all y.
>> 
>> I assume he means
>> at
>> (y - sqrt(y^2 + 1)) + 1/(y + sqrt(y^2 + 1))
>> 
>> 
>
> No, he means what he wrote, which is
> |y-√(y²+1)| - 1/(y+√(y²+1)).
>
> In D notation:
> abs(y-sqrt(y^^2+1)) - 1/(y+sqrt(y^^2+1)).

What are you saying? You haven't changed anything but slight 
notational differences. It's still wrong, so if he really means 
that then he is wrong, else it's just you.