#5130: [with patch; positive review] create a prime_pi function that doesn't
just
compute len(prime_range(n))
---------------------------+------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.0
Component: number theory | Keywords:
---------------------------+------------------------------------------------
Comment(by mabshoff):
Well, I am not too happy that there are special long long sqrt() work
around function in this file. Since the code is by Bill I think they
should be somewhat reliable and they seems to detect numerical precision
issues, but I still do not trust them to work reliably, i.e. Sparc.
Anyway, I would like them to be moved to its own file and I would like to
see a test that compares and verifies their output for a wide range of
inputs against MPFR for example. Even nicer would be the ability to switch
away from this function and use MPFR functionality in its place. This is
not something that will prevent this code from going in unless the current
doctests will get broken on something like Sparc/Solaris where I have
detected problems with the number_of_partitions() test that also relies on
some sqrtl() function.
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5130#comment:18>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en
-~----------~----~----~----~------~----~------~--~---
