Re: [sage-support] Re: Sage installation on windows : browser cannot connect
There is some Sage meeting this afternoon in Paris. I have a Windows 7 installation on my laptop, I'll give a VirtualBox installation a try, maybe I'll be more lucky than last time. That was particularly painful to have people ready to try Sage on their computer at a previous meeting, but being unable to connect to the Sage notebook server running inside the virtual machine. By the way, I have had no problems running a notebook server within a VirtualBox virtual machine on a Debian guest, and having a dozen of students connecting to it from distant hosts... On Tuesday, April 17, 2012 8:49:01 PM UTC+2, Volker Braun wrote: Yes, except that any machine on the LAN can act as a dhcp server. Not just the VM host. On Tuesday, April 17, 2012 2:45:05 PM UTC-4, Robert wrote: OK. So if my Windows machine isn't also a DHCP server for the Sage Virtualbox, there will be nothing. Good to know. Thanks! On Tue, Apr 17, 2012 at 2:40 PM, Volker Braun vbraun.n...@gmail.comwrote: If you set the networking to bridged the IP address of the virtual machine will be determined by dhcp. If you don't have a dhcp server, it will not set up networking. On Tuesday, April 17, 2012 2:30:04 PM UTC-4, Robert wrote: On Wednesday, March 28, 2012 9:06:31 AM UTC-4, Matthias L wrote: Dear group, I've tried to install Sage on Windows 7 following the installation guide linked below. It seems to work until step 4, I get the same console window as shown in the screen shot there (Open your web browser). But if I do so, I can't connect to Sage and receive a 404 error instead. Installation guide http://wiki.sagemath.org/**SageAppliancehttp://wiki.sagemath.org/SageAppliance Virtual Box 4.1.10, Sage 4.8 Some ideas? Thank you, Matthias I also am stuck, but my problem is a Virtualbox problem. I have Sage-4.8 running, but I don't know how to see it from another computer. If I have it to NAT I can see the notebook on my PC. If I make it bridged, what is the IP address I'd use? If it were local I'd use http://localhost:8000. My machine has a fixed IP. Do I use aaa.bbb.ccc.ddd:8000? That isn't working for me. Do you have any suggestions? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- Robert Blanchette robert.blanchet...@gmail.com @TeamGeofrog -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Sage installation on windows : browser cannot connect
If I make it bridged, what is the IP address I'd use? stop the sage notebook server (with Ctr-C) and type ifconfig. This should show you your IP address on the network. It should also show in the startup message of the notebook server. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Determining if a ring has any non-trivial idempotents
I would doubt it very much. I imagine the same techniques as Fr\ohlich,A. Shepherdson,J.C., Effective Procedures in Field Theory. Phil, Trans. Roy. Soc. Ser. A 248(1955-6) pp. 407-432, can be used to construct a ring which has nontrivial idempotents iss we can determine membership in a recursively enumerable sequence. I think you would need to know how the ring was constructed. On Tuesday, 17 April 2012 19:37:29 UTC+1, diophan wrote: Is there any way in sage to determine if a commutative ring with unity R has any idempotents other than 0 or 1? My R's have infinitely many elements so squaring all the elements isn't going to work. This is equivalent to R being isomorphic to a product of two non-trivial rings. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Determining if a ring has any non-trivial idempotents
On 18 April 2012 15:50, diophan rdeberh...@gmail.com wrote: I'll check out the reference. If it makes the situation any better the ring is a quotient of a polynomial ring over a finite field. If it's a quotient of a one-variable polynomial ring, you can just factor the defining polynomial, can't you? The quotient will have non-trivial idempotents iff the polynomial has more than one irreducible factor. David -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Determining if a ring has any non-trivial idempotents
It's multivariate (sorry I didn't specify), so being irreducible and having no non-trivial idempotents aren't equivalent. On Wednesday, April 18, 2012 4:04:04 PM UTC-4, David Loeffler wrote: On 18 April 2012 15:50, diophan rdeberh...@gmail.com wrote: I'll check out the reference. If it makes the situation any better the ring is a quotient of a polynomial ring over a finite field. If it's a quotient of a one-variable polynomial ring, you can just factor the defining polynomial, can't you? The quotient will have non-trivial idempotents iff the polynomial has more than one irreducible factor. David -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Importing Cython .so module
Hi Robert, thanks for taking an interest in my problem! I've been unwell, and could not respond sooner. I can't put an __init__.py file in the top-level /site-packages directory as far as I am aware, and I'm not sure that would be a sensible thing to do to my users... I think my original email specifies the problem clearly: I have a package I would like to distribute, that Sage users can install using distutils, and I want to be able to import a Cython-generated extension without it polluting the global namespace. I suspect this is nothing to do with Cython, or Sage, but to do with Python or disutils, but I am not sure... If someone could at least clarify what area this problem fits into that would be a great help because I can then go to the appropriate forums. Thanks, Emil -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
