I created a plane and extruded some edges from it on edit mode. As you see the screenshot, I filled the last two edges to make a rectangular donut. Then I selected all inner edges and tried to dissolve them. But some edges were never dissolved.  How can I accomplish it?
So, I'm working on a control station that has buttons. It is a one-mesh creation, that means, I don't want to create buttons and things like that separated from the main mesh, but as you can see, I have problems. I would like to make the highlighted parts to be one with the main part around them. I've tried everything, and I have this problem on multiple creations. Any idea?  Update: I've added another example of the problem. I want them to be one face, instead of two. (2nd picture)
So from what I remember it was on cable TV. The main hero was a TV actor zapped to a alien planet. It had a evil overlord with a virgin priestesses. She wants to get laid but he refuses because the next priestesses is only three. Regardless it's a parody things include a man who was maimed by the evil overlord wants revenge the hero eventually screws the virgin priestesses it cuts to scenes of a train going into a tunnel and a volcano erupting. How to apply standardization/normalization to train- and testset if prediction is the goal? $a, b, c$ are positive real numbers.   Prove that $$8abc\le (a+b)(b+c)(c+a)$$  I haven't really gotten anywhere, just tried to open up $(a+b)(b+c)(c+a)$ and got null. The bottom bracket of my bike was completely stripped to the point that when you push the left side crank arm, the right crank moves and you can see the bottom bracket lock move out the frame. The bike shop tried putting Teflon tape but it's temporary. It's a 26' xc hard tail. For all I know both sides of the bottom bracket(square tapered) are stripped clean hence the Teflon tape put by the previous owner. Can I fix the problem by changing into a hallow tech cranks because it works like a thread less bb, or should I just buy a thread less square tapered bb? Any suggestion on what to do? When & how did Yoda come to know about the Rule of Two? How do I prevent widow/orphan lines? When I run sudo, what exactly happens to my environment?  When I run sudo command, it doesn't seem to see my or root's environment. For example, my path for both includes /usr/local/bin, but if I try to run one of the program's without the full path, it fails.  I thought sudo ran as root, and hence got root`s environment. Is there a different way that bash executes under sudo than under root or my normal user?  EDIT:  I have been using sudo -i lately, but recently it has been causing problems because my current working directory gets set to /root. This is as expected (sorta), but I still don't understand why sudo isn't recognizing my executables in /usr/local/bin.  EDIT:  I am running Fedora 15. How to pluralize an acronym which ends in 'S' correctly? When using the acronym package, how can you  an acronym which ends on 'S'?  Take the acronym: OS - operating system  It should be pluralized as OS's, but is pluralized as OSs when using \acp. How to get a vintage/dreamy look like this photo?   It has some yellow color cast and seems like extra blur added in post process? Proving the summation formula using induction: $\sum_{k=1}^n \frac{1}{k(k+1)} = 1-\frac{1}{n+1}$ I am trying to prove the summation formula using induction:  $$\sum_{k=1}^n \frac{1}{k(k+1)} = 1-\frac{1}{n+1}$$  So far I have...  Base case:   Let n=1 and test   $\frac{1}{k(k+1)} = 1-\frac{1}{n+1}$  $\frac{1}{1(1+1)} = 1-\frac{1}{1+1}$    $\frac{1}{2} = \frac{1}{2}$   True for n=1   Induction Hypothesis:   Assume the statement is true for the n-th case   $\sum_{k=1}^n  \frac{1}{k(k+1)} = 1-\frac{1}{n+1}$  Inductive Step:   Prove, using the Inductive Hypothesis as a premise, that   $$\sum_{k=1}^{n+1}  \frac{1}{k(k+1)} = \sum_{k=1}^{n}  \frac{1}{k(k+1)} + \frac{1}{(n+1)(n+2)} = 1-\frac1{n+1} + \frac{1}{(n+1)(n+2)} = \frac{(n+1)(n+2)}{(n+1)(n+2)}+\frac{-2-n}{(n+1)(n+2)}+\frac{1}{(n+1)(n+2)} = \frac{(n+1)(n+2)-2-n+1)}{(n+1)(n+2)} = \frac{(n+1)(n+2)-n-1}{(n+1)(n+2)} = \frac{n^2+2n+1}{(n+1)(n+2)} = \frac{(n+1)(n+1)}{(n+1)(n+2)} = \frac{n+1}{n+2}$$  To prove $$ 1-\frac{1}{n+2} = \frac{n+1}{n+2} $$ Multiply both sides by $n+2$ to get an equivalent expression. $$ (1-\frac{1}{n+2}) * (n+2) = (\frac{n+1}{n+2}) * (n+2)  $$ $$ n+1=n+2−1 $$  Does this all make sense? How can this be improved upon? Cartesian Product of Two Countable Sets is Countable Induction: Prove that $4^{n+1}+5^{2 n - 1}$ is divisible by 21 for all $n \geq 1$. Induction: Prove that $4^{n+1}+5^{2 n - 1}$ is divisible by 21 for all $n \geq 1$. How to delay a program such as cairo-dock (No openGL) or Firefox?  Sometimes programs crash when started with other startup apps. I want programs to start 10 seconds late to avoid a crash. pdflatex, \includegraphics, and multi-page PDF files I have a PDF file with multiple figures; each figure is a separate page in the PDF file.  I am using pdflatex, and I would like to use \includegraphics or equivalent to include some of the figures.  Of course I could use an external tool to split the PDF file into multiple one-page PDF files. Then I could use \includegraphics as usual. However, I would have a much simpler workflow if I could avoid this extra step. Hence the question:  How can I include, e.g., page 3 of foo.pdf as a figure?  I am aware that there is a Latex package called pdfpages, but it seems to be designed for something else: with pdfpages, each page in the input file will produce a full page in the final document, not just a box. ffmpeg working from command line in Terminal but not in an Automator shell script! I'm really having a hard time with this topic in probability theory and I was wondering if someone has any tricks, tips or anything useful to help me understand it. In my notes I am told that $X\sim$Uniform$[0,1]$ and $Y\sim$Uniform$[0,1]$. My professor wrote:      $f_{X+Y}(Z) = \int_0^Z f_X(x) f_Y(Z-x)\;dx \neq Z$   Then somehow he came up with these cases where $Z$ is defined, and used that in making the pdf. I'm just not sure of how he did this or how he also came to find $P(X_1+X_2\le 2)$. Can someone help me fill in the blanks? I went to him directly but he just said the same thing as in lecture and wasn't helpful. How can you accelerate without moving? I know this question has been asked in other forms, generally regarding the balance of forces.  This time I want to focus on motion.  I've got a laser accelerometer on my desk.  It tells me that I'm accelerating at $9.8~\rm m/s^2$.  For the first experiment I'm travelling in space.  I pick a nearby star and discover that I move about $490$ meters in $10$ seconds from that star.  For the next experiment I'm on the surface of Earth.  I measure the same acceleration with my laser accelerometer.  I pick a spot (the center of the Earth) and discover I don't move at all in $10$ seconds.  How is acceleration without motion possible? What do I do now if I contributed to Roth IRA in 2012-2013 and my MAGI exceeded the limit? In 2013 I opened a Roth IRA for year 2012, contributing $4000 for year 2012.   In 2014 I contributed $5500 to that same Roth IRA for year 2013.  In 2015, I realized I was not eligible to contribute to a Roth IRA in 2012 and 2013 due to MAGI exceeding the limit. I opened a new account (Traditional IRA), deposited $5500, then immediately did a conversion to a new Roth IRA. (This is the "backdoor" approach as I understand it, is perfectly legal, and what I should have done in previous years). So I believe my Roth IRA account #2 (for tax year 2015) is in good standing  So now, what exactly should I do with the first Roth IRA account that I contributed to (incorrectly) for years 2012-2013? Luckily (?) there is only about $500 of gain in the account at this time.  If I re-characterize it as "Traditional IRA", have I missed the opportunity to do the conversion to Roth IRA for years 2012 and 2013?  Out of curiosity: Had I not caught this error, what would be the implications at Retirement time when I tried to take money out of the Roth IRA? Would the funds be treated as ordinary income (plus penalty?)   Lastly, with all this seemingly "fancy footwork" opening Traditional IRA and converting to Roth IRA, what documents (if any?) do I need to hold on to when it comes time to withdraw from the Roth IRA at retirement time to ensure the tax-free benefit? script custom previews in a menu I want to know how to create a menu with previews for an add-on. Until now I know that this is related with the bpy.utils.preview. I'm making an add-on that appends objects from a .blend file, I know how to append objects but what I want to do is to create a menu with previews of the objects /(similar to the matcaps menu - see below), select them and then press an &quot;import button&quot; to append the object. Here's some documentation about the module:    Also, as this is an add-on I don't know if I should have a def register() and a def unregister() inside this .py file as well as in the __init__.py file. Cannot change stroke width in Inkscape I am trying to change the stroke width of an icon in Inkscape but, unlike other times I have done this, this time the stroke width appears to be 0 px and I am not allowed to make it thinner:    The stroke width is actually quite large already, is there another setting I should edit to make it thinner?  You can download the file I am working on .  BTW: sorry for the potato quality of the screenshot, this is what you get using Inkscape on a retina screen :/