Arjen Markus

@Ondřej Čertík ***@***.***>, yes, I am interested to help out. It is an exercise in practical mathematics :). (FYI: I have experience with implementing special functions in a different language)...

I have started looking into the relevant algorithms, using a book on the subject, The Mathematical Function Computation Handbook by Nelson Beebe. While that puts a lot of emphasis on...

Just a quick update: I implemented cosine and tangent in the straightforward, if not naïve, way. As expected the errors are a trifle larger for cosine than for sine (as...

Right, I will concentrate on a fast implementation for now. BTW, a quick examination of the tan() results shows that the largest differences occur where the function itself is large....

Hi Ondrej, I have completed the implementation of cos, tan, asin, acos and atan. See the attached code. I only tested them with the simple and rough test program, but...

I have an update for the trig routines (now elemental) and a new set of routines for the exponential functions and their counterparts. Note: because of restrictions on the functions...

Yes, that is fine with me - it is closer to LFortran than if I owned the repository :). Op wo 15 sep. 2021 om 06:52 schreef Ondřej Čertík ***@***.***...

Definitely. There are quite a number of libraries out there that claim to calculate these functions. But a good reference is necessary to ensure the quality. In addition to the...

The SLATEC library on the Netlib site seems to offer quite a few routines for special functions as well. Things I am wondering about: - Should we formulate accuracy requirements,...

The Netlib site is a trifle vague, On their FAQ page: * 2.3) Are there restrictions on the use of software retrieved from Netlib? * Most netlib software packages have...