Re: Putting features in vs. leaving them out, especially functions
Arnold
Thanks, that modifies my opinion. But what's the justification for including these particular ones? What about something like
(log(1-x) - x)/x^2 or (atan(x) - x)/x^3 or ...?
When you need THOSE, do you code them yourself?
John
On 25 May 2011, at 12:18, Arnold Neumaier wrote:
> On Wed, May 25, 2011 10:06, John Pryce wrote:
>> Stuff like (1-cos x)/x^2: people to whom these are important are
>> competent enough to code them themselves; they are unlikely to be
>> performance-critical.
>
> They are needed for the efficient implementations of slopes and
> second-order slopes, which we use in our COCONUT global optization
> environment almost as much as CP.