[sage-support] Re: www.sagenb.org vs alpha.sagenb.org

[William Stein]

 The main purpose of my email was to make a point about trusting the
 answers being crucial to the sage project. After sending the email I
 realised another viewpoint: if you stuck to a safe version of sage
 on sagenb.org, few people would use the alpha server and you'd lose a
 great opportunity to find bugs in the latest releases, which is a pay-
 off for providing the computational resources of sagenb.org.

True.  jokeAlso if we stuck to a safe version of Sage, it might
look like this:

#includestdio.h
int main(void) {
printf(sage: \n);
}

/joke   :-)

 -- William

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[sage-support] Re: www.sagenb.org vs alpha.sagenb.org

[William Stein]

On Sun, Jun 14, 2009 at 8:43 AM, Marky Marcmarcahr...@gmail.com wrote:

 Hi,
 The two machines listed in the subject line seem to be running
 different versions of sage, viz. 4.0.1 and 4.0.rc0 respectively.

They are both running sage version 4.0.1.  The notebook sever on
alpha.sagenb.org is still 4.0.rc0, but the actual version of Sage you
get when you run it is 4.0.1.   When I restart alpha.sagenb.org, it'll
be 4.0.1.   You can see what version of Sage is being run by typing
version().

 Does the alpha machine run alpha versions of the software?

Sometimes.

 Or is it a DEC alpha?

No.  You could also tell this is not the case by typing, e.g.,
os.system(uname -a) into a worksheet cell in alpha.sagenb.org.

 How do the versions of sage on these machines reconcile
 with with the term alpha?

alpha refers to alpha version, as in an alpha version of the software.
The *only* place that I've ever seen link to alpha.sagenb.org is a link from
sagemath.org that says [test version] in the link title, so I'm curious why
you don't know the answers to your questions above already, based on that.

 Given that there are serious problems with exp(.) functions in
 v4.0.1 (http://trac.sagemath.org/sage_trac/ticket/6256), wouldn't it
 be better to run a trusted version of sage on www.sagenb.org?
 Projects like sage are great and the people who work on them do
 admirable work. Without users being able to trust the answers returned
 by sage, though, the software becomes somewhat impractical. This trust
 is hugely important. Is it possible to take www.sagenb.org back to a
 trusted version?

But #6256 will be fixed in sage-4.0.2, which will be released within
the next 3-4 days.  In the meantime, you can use any previous version
of Sage that you want by downloading it from http://sagemath.org/src/.

 -- William

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