Calculating the number of missing numbers
Android finding missing numbers
Area of an ellipse. (Calculus) I have a project where I have a few layers (State of Texas, cities, roads, etc.). They are all resaved and projected to NAD83 / UTM zone 14N EPSG: 26914. The project CRS is also NAD83 / UTM zone 14N EPSG: 26914 and on the fly projection is enabled. I added a text delimited file and cannot get them to line up. I checked the attribute table of the delimited file and the coordinates are correct. I cross-checked this with a point close to where a few of the points from the delimited file are and they are very close so in theory they should be lining up. I tried to save the delimited file and save it with the same projection and add the shp file back in and that did not work. Anyone have any ideas? I can't think of anything else to try. In this sentence:  "We would also accept an international transfer, but in that case we would ask you to pay your bank's charges at the time of the instruction to ensure that we received the full amount"  is it correct to use "received" or should it be in present tense? I found this heart while exploring the crimson biome - what is it? If $g \circ f$ is surjective, show that $f$ does not have to be surjective? Suppose $f: A \to B$ and $g: C \to D$ are functions, and that $B ⊆ C$.  I need to come up with an example where $g \circ f$ is surjective but $f$ is not. I'm confused on how exactly to do that, but I understand that to show something is surjective you have to have the range of the function equal to the codomain of the function. Here's my attempt:  So if $g(x) = x^2$ with a codomain of $ℝ$, and $f(x) = \sqrt{x}$ with a codomain of $ℝ$, then $g(f(x)) = (\sqrt{x})^2 = x$. Since the range of this function and codomain are the same, this is surjective.  But, since $f(x) = \sqrt{x}$, its range is only $[0, ∞)$, which is smaller than its codomain of $ℝ$, meaning $f$ is not surjective. The complex general linear group is a subgroup of the group of real matrices of twice the dimension and with positive determinant.  Let us decompose complex matrices $M$ as $M=A+iB$, where $A,B$ are real matrices. Now consider the correspondence $$f(A+iB)=\begin{pmatrix} A &amp; -B \\ B &amp; A\end{pmatrix}.$$  If $\det f(M)=|\det M|^2$ for square matrices, then we would have $GL(n,\mathbb C)\subseteq GL_+(2n,\mathbb R)$ with the identification $M\to f(M)$, which is an injective homomorphism. In other words, the complex general linear group would be a subgroup of the group of real matrices of twice the dimension and with positive determinant.  How is $\det f(M)=|\det M|^2$? Local timezones on servers considered harmful? I'm curious as to what other administrators' experiences with timezones, in the context of remotely administered servers, are. In my career I've come across several conventions;   Always, always, always use UTC.   Always, always, always use the timezone of wherever base HQ is. Use the local time of the people who happen to be administering.  Use the local time of the server location.    In some places, I've come across multiple and conflicting conventions. My own preference has been to use UTC, always - with no daylight savings. But for one reason or another, it seems that most people prefer to use some concept of local time, with daylight savings. Although it seems like a straightforward technical matter, discussions around changing conventions always seem to trend towards religious schisms.  What are you using? What do you consider to be the advantages and disadvantages of each approach? Can anyone explain to me why I would want to use IList over List in C#?  Related question: Do lure modules and incense cause new pokemon to spawn near you, or existing pokemon to be drawn to you? Is this an instance of Priori Incantatem? During the climax of Fantastic Beasts and Where to Find Them, Tina briefly duels with Graves and their wands appear to lock with each other (see picture). I believe this also happens some other times in the later Harry Potter films other than Harry and Voldemort's duel in the graveyard during Goblet of Fire.    We know that this is definitely a case of Priori Incantatem for the graveyard duel in Goblet of Fire, as the wands are locked for a sufficient amount of time for past spells to begin showing themselves (significantly, showing the people Voldemort had murdered), but is this the case for the other instances of wands locking? If so, does that mean there are a lot more wands out there with shared cores, as it was my understanding this could only happen if that criteria was satisfied? Not sure if this is a bug or a feature, but I noticed today that if I , it annoyingly one-boxes a link to the room, which is not a link to the info page! That's it. I'm gonna pack up and leave! Such annoyance! But for the time being,  Is this behavior expected? If so, what is the reason for changing the links? If this is really a bug since the responsible bot is not seeing parts of the URLs and ends up one-boxing, and hence linking to the wrong message, could this be fixed please? Worth pointing out that too much exposure to annoying things results in a higher blood pressure. How have Superman comics dealt with the Man of Steel, Woman of Kleenex problem? When I was a teen and Superman II came out, when Superman realized he and Lois were in love, he de-supered himself in the Fortress of Solitude so he could be with Lois.  Right after he emerged from the crystal cage that drained his powers, the first thing he does is take Lois' hand and escort her to a conveniently placed bed that we had never seen there before.  This implies it was necessary for him to lose his powers so he could have sex with Lois.  The problems involved in this situation are well covered in the wonderful essay by Larry Niven, .  But I also know that Superman has been in the comics for decades.  A friend of mine once said, "Oh, he tells her who he is a lot, but he always makes her forget it again later."  So how have the comic books (since this is Superman's primary medium) handled this?  Were there different ways it was handled, or was it always handled the same way?  Have they literally kept Superman and Lois from having sex for decades?  Or have there been times when they've ended up in bed together?  How do they deal with the issues of the Man of Steel having sex with, and not killing, a woman of Kleenex? What is the proof that the total number of subsets of a set is $2^n$? Why is ++i considered an l-value, but i++ is not? Why is ++i is l-value and i++ not? Using continuous color band for raster legend in QGIS composer legend? I'm looking for a way to insert continuous colour legend for a raster layer.  I managed to create discrete symbols with values along the bar, but I would like to have a continuous bar with some values on the bar, similar to the old plugin "One-Band Raster", that it doesn't work with the QGIS version higher than 1.7  I tried to set in properties->style, where I selected the  Render Type "Singleband pseudocolor" and see the "generate new color ramp" box.  I tried both "Continuous" or "Equal interval". However, in the Composer the legend always is displayed with discrete symbols.  Is there any way that can make QGIS Composer to display a nice continuous band for a raster layer? Is it possible to reference the most recently modified file in a command line argument? I frequently download PDF files with heinous numeric file names from my browser.  These automatically go into ~/Downloads.  Ideally I would like to just be able to open these files with:  evince "the most recently modified file"   without having to open ~/Downloads to find the file name.  Is there a simple way to specify "the most recently modified file" in bash?  NOTE: I know that it is possible to do this, but ideally I am looking for a solution that would be simpler than ls -t'ing ~/Downloads to check the name. Why can't ARIMA model large lags and/or long range dependence? ARIMA cannot model large lags (obtained from autocorrelation plot) and long range dependency (hurst exponent $H &gt; 0.5$). Why is it so? Why do cars gain lift while going at a high speed? I've been researching the physics involved with spoilers and I've just been turning up the same information about spoilers giving the back wheels of a car more traction by acting as an up side down airfoil.   So my question is, what exactly causes the car to apparently gain lift while moving quickly, so as to merit the use of a spoiler, and is this entirely due to the aerodynamics of the vehicle in question?   Edit: Clarity of question. Would it be possible for some to bend two elements? After reading this question  While it seems that it would break one of the rules of the show, that only the avatar can master all four elements. There would also be good reasons as to why someone couldn't learn all four, there is always the opposing element that is hardest for the Avatar to learn. I don't see any reason why someone couldn't learn to bend two elements (not master, but just bend since Thadeus's Answer  to the previous question is apparently the Definitive Answer on the subject.)    Many benders do learn to bend beyond their element such as Toph becoming a metal bender and Katarra bending blood. Now metal is considered part of the Earth but so is sand and it seems that sand is moved more like water. Iroh was able to adapt a water bender technique to fire bending which means it is possible to learn and use different bending styles. Also Iroh spent time connecting to the spirit world and that seems to be the main reason the Avatar is able to bend all 4 elements. So if someone was connected to the spirit world or even their past life that would fulfill that requirement.   Would it be possible to bend two elements?  There do seem to be times where it has been done in the series such as bending mud which is both Earth and Water. And there would definitely be limits such as a Earth bender couldn't bend Air and a Water bender couldn't bend Fire. But why couldn't a Fire Bender learn to bend Air. They both use breath control as a main focus of their bending. It also states on the Energybending wiki entry that all bending used to be done as an inner bending but that it became element bending.   So with new bending techniques being formed all the time, already stated used of combined elements being used, an assumed spiritual connection to a past life or a spiritual journey been taken, energybending rediscovered is it possible that two elements could be bent by one bender who is not the Avatar? how to reset gnome panel? I think my gnome-panel is messed up because I alt+right click it and nothing pops up.  I'm on 12.04, classic gnome desktop.  so I used locate and found gnome-panel in .gconf somewhere, how do I clear just gnome-panel's settings so that I can add things to my panel again?   edit:  matt: ~/.gconf $ find|grep -iw panel ./desktop/ibus/panel ./desktop/ibus/panel/%gconf.xml ./apps/gnome-settings/gnome-panel ./apps/gnome-settings/gnome-panel/%gconf.xml