Monday, January 28, 2013

LaTeX Tips: Displayed Math - adding sections, subsections, etc. to equation numbers

LaTeX Tips: Displayed Math

How to number equations. By default, LaTeX will number equations consecutively, as (1), (2), etc., assuming you use the automatic equation numbering mechanism. If the paper is very short, or if there are only a few numbered equations, this is fine, but once the numbers get into the twenties and higher, a scheme that numbers equations by section, as in (1.1), (1.2), ..., (2.1), etc., is preferable. In fact, for the vast majority of journal articles, the latter is probably the best numbering scheme. To get equations numbered by section, just put the following into the preamble: " \numberwithin{equation}{section} ". For books, theses, or very long papers, an equation numbering scheme that is three levels deep (with numbers like (4.1.1), etc.) may be appropriate. To get this, just replace "section" above by "subsection", or the corresponding innermost level. The same mechanism works for other counters, e.g., theorem counters, instead of "equation".

If you have a thesis or some other class/document type it may be different.  In my case (UTK thesis/diss class) it automatically numbered 3.1 for chapters.  So for "3.1.1" it was "section," and "3.1.1.1" I used "subsection."

Friday, January 25, 2013

Sage: Open Source Mathematics Software v. 5.6 now out

Sage: Open Source Mathematics Software

Sage has released version 5.6

Monday, January 14, 2013

Windows - Nvidia - Display driver NVIDIA Windows Kernel Mode Driver, Version ???.?? stopped responding and has successfully recovered

Ok, so I am using my advisor's Dell Precision M4500 laptop for Windows (7 specifically).  It has a Quadro FX 1800M card onboard with a driver version of 259.22 installed.  I kept getting occasional screen freezes in which I had to reboot.  Every now and then the system "recovered" and gave me this error:

Display driver NVIDIA Windows Kernel Mode Driver, Version 259.22 stopped responding and has successfully recovered

Finally sick of it, I googled and found this:

The complaint:

"Display driver NVIDIA Windows Kernel Mode Driver, Version 186.81 stopped responding and has successfully recovered." I keep getting this message since I installed Windows 7 Ultimate, it is only slightly different than the error message I got with Vista, please help!
Windows lovely response:
If you have a desktop machine, get the latest drivers from here.. http://www.nvidia.com/Download/index.aspx?lang=en-us If you have a laptop, contact the laptop manufacturer as they are responsible for the proprietory drivers that you will need.. Mike Hall MVP - Windows Desktop Experience http://msmvps.com/blogs/mikehall/
This is why I hate Windows!!!!! Thankfully the community pitched in. I first tried this:
After many weeks of Googling, going through 100 threads, trying many of the solutions (some of which being ridiculous like reformatting, replacing hardware, etc.), I found ONE POST that suggested what I can now confirm fixes this problem. Not "it hasn't happened yet, keeping my fingers crossed", but actually fixed. THE SOLUTION: Nvidia Control Panel -> 3D Settings -> Set PhysX configuration -> Select a Physx processor -> choose your graphics card instead of leaving it on auto-select.
Like this^^^ user said, there are many fixes out there. This one^^^ didn't work. However, I found this nice post at the top and seems very reasonable since (total guess) I feel like over heating was a problem. This computer had overheating issues before when someone else used it, but it wouldn't stay one in their case. So far so good:
Ok guys, i fixed the problem... patched it at least... I had the same problem (different model same story... as everyone else) Nvidia and Windows 7 64 (read some problems with 32 too) don't get along too well.... i tried all solutions i found over the web, nothing worked.. Here is how i fixed it, i desactivated all windows visual goodies & stuff... Right click on my computer, go to property, then in left margin select: advanced system settings, third tab, called "Advanced" First option : Performance click on "settings", select "adjust for performance" that will uncheck everything, then you can keep the 3th and 4th from the end checked (smooth edges on screen fonts & smooth-scroll list box, if you want the webpages text to look the way they should.. quite essential to keep the font thing..) my system became stable after that, no more video card crash, no more Display driver NVIDIA Windows Kernel Mode Driver, Version (whichever i tried) stopped responding and has successfully recovered VERY STABLE, and very simple... looks like win98 but functionnality are fully there... (without even mentionning how much faster this thing boots... ) When you see it's working well & stable, add options, one at a time... (i would recommand the useful options you miss, not the estetic that looked good) i added "show thumbnails instead of icons" and it's still stable... that way, if it become unstable or start over again, you know wich one to uncheck... it works for now, and let's hope Nvidia will release new drivers that actually works soon,... hope this post will help other poor customers of Nvidia to stop those frustrating msgs... i figured i seen so many posts with that problems it was worth to post actually worked... have a good day all...
I don't need or care for all the fancy stuff anyways. I do the same in Ubuntu/Mint with fallback or now Cinnamon because Unity seems to freeze with all the nonsense (nothing's perfect) and won't work (without much effort) with more than 2 monitors. Anyways, like I said it works for now and at least the performance is MUCH better. Looks like the old Windows 95 or 98 in places, but who cares?! Not me!!

NM!!  Was watching a Youtube video full screen and it froze!!!  Dammit!  I don't think I'll ever by a Dell!!!  Going to turn this POS in to get serviced!

Wednesday, January 9, 2013

Mark Shuttleworth Demos Ubuntu for Phones at CES 2013, Looks Really Slick, No More Lag! [Video] | Tech Drive-in

Mark Shuttleworth Demos Ubuntu for Phones at CES 2013, Looks Really Slick, No More Lag! [Video] | Tech Drive-in

Ok, so this is why Ubuntu has gone in its direction!  Finally, one device for TV, tablet, phone, and desktop!!  I can't wait to see this in action.  C'mon Ubuntu!  If they pull this off it will be bank!!!

This is what the Unity interface was exclusively designed for.  Ubuntu/Cano may have put the cart in fron tof the horse in this instance, but Unity is more optimized for touch screen.  I guess Ubuntu wanted to test it and run it as a desktop system (their strong link) before trying mobile devices such as phones, tablets, and touch screen computers.

Tuesday, January 8, 2013

Everything You Forget About LaTeX: Formatting Tables - Adding space to rows and columns

Everything You Forget About LaTeX: Formatting Tables

Column Width: \tabcolsep
Usage: \renewcommand\tabcolsep{6pt}
Explanation: tabcolsep is HALF the space between two columns. Default value is 6pt

Row Height: \arraystretch
Usage: \renewcommand\arraystretch{1}
Explanation: arraystretch is a FACTOR representing the distance between two rows. Default is 1

Landscape in LaTeX - Good for large figures and/or tables

http://texblog.org/2007/11/10/landscape-in-latex/

To change whole document to landscape use the command:

\usepackage[landscape]{geometry}

To change the page content but not the page layout use:

\documentclass[landscape, 12pt]{report}

To change a section (for printing):

\usepackage{lscape}

To change a section (for screen viewing):

\usepackage{pdflscape}

where sections are wrapped in the environment

\begin{landscape}
...
\end{landscape}


Wednesday, January 2, 2013

Wait is Over, Canonical Previews Amazing new Ubuntu OS for Smartphones! | Tech Drive-in

Wait is Over, Canonical Previews Amazing new Ubuntu OS for Smartphones! | Tech Drive-in

I haven't been overly excited nor impressed recently with Ubuntu nor Mint.  However, this is in part due to upgrading Ubuntu versions without properly backing up because for some reason (this is a knock on Ubuntu) every time I (you) upgrade versions something breaks.  For Mint, something has broken with the updates (on my laptop) :( ?!?!?

Anyways, an Ubuntu OS for smartphones (and tablets too, I hope) is freakin' awesome!  Can't wait to see the final product!!