ec92's profile - activity

I'm trying to solve the equation $$ \zeta'(x)/\zeta(x) = - 3/4 $$ numerically. I'm expecting/hoping for an answer between 1 and 10.

I tried

$\texttt{ find_root(diff(zeta(x))/zeta(x) + 0.75, 2, 40)}$,

but this returns 0.0. I don't know what that ratio of zeta functions looks like, so it's possible there isn't a root, but I don't see why I'm getting an answer outside the specified interval.

Can anyone help find the true root? Thanks.

Thanks, but this doesn't seem to work for me. I use a SecureShellClient interface to log into my university's system, and then I have the Linux command lines. At that point, I'm already logged onto a remote server ( I think), and then SSH again into the specific machine I need. I don't think that the command lines are ever associated with my local machine.

I am trying to use Sage by SSH into my university's computer system. I succeeded in getting into the computer which has Sage installed on it. I am running SecureShellClient on a windows machine. However, when I try to actually run the program, I run into problems. I type

$ sage -n

and get the following

----------------------------------------------------------------------
| Sage Version 4.5.3, Release Date: 2010-09-04                       |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------

Please wait while the Sage Notebook server starts...
...
The notebook files are stored in: sage_notebook.sagenb
**************************************************
*                                                *
* Open your web browser to http://localhost:8000 *
*                                                *
**************************************************
2012-07-02 13:00:49-0500 [-] Log opened.

2012-07-02 13:00:49-0500 [-] twistd 9.0.0 (/usr/share/sage-4.5.3/local/bin/python 2.6.4) starting up.

2012-07-02 13:00:49-0500 [-] reactor class: 
twisted.internet.selectreactor.SelectReactor.

2012-07-02 13:00:49-0500 [-] twisted.web2.channel.http.HTTPFactory starting on 8000

2012-07-02 13:00:49-0500 [-] Starting factory <twisted.web2.channel.http.HTTPFactory instance at 0xa6be8ec>

xprop:  unable to open display ''

usage:  xprop [-options ...] [[format [dformat]] atom] ...


where options include:

    -grammar                       print out full grammar for command line

    -display host:dpy              the X server to contact

    -id id                         resource id of window to examine

    -name name                     name of window to examine

    -font name                     name of font to examine

    -remove propname               remove a property

    -set propname value            set a property to a given value

    -root                          examine the root window

    -len n                         display at most n bytes of any property

    -notype                        do not display the type field

    -fs filename                   where to look for formats for properties

    -frame                         don't ignore window manager frames

    -f propname format [dformat]   formats to use for property of given name

    -spy                           examine window properties forever

When I try to open http://localhost:8000 in an in internet window, I get "Unable to Connect" from Firefox, and a similar message when I try to open it in Internet Explorer.

I'm very new to Sage and Linux, and have no idea what's going wrong here. I haven't been able to find any instructions on how to run Sage through ssh, so I'm wondering if I'm missing a step somewhere.

Thanks.

I have just installed VirtualBox and Sage on my Windows machine. I want to install the sage-combinat queue. However, when I start Sage in the VirtualBox, it goes to a graphical notebook interface. How can I get to a command line to install the queue? Pardon if the question is unclear; I'm not very skilled with manipulating computers.