Searching for two popular tags as an unregistered user in the search entry field on the top right of an SE page, searches instead for questions tagged with only the first search term. For example, on Arqade, searching for steam achievements runs a search for questions tagged with  and ignores achievements.  I also found the same issue when searching for bash zsh (both of which are among the more popular tags) on U&amp;L. I cannot reproduce this when logged in and it only seems to affect searches whose search string consists of two popular tag names. Lesser tags and non-tags work as expected. As does searching for the same two words on the search page (the one where the results are shown) also works as expected, so this is specific to the top right search field. When searching for a word that also happens to be a tag, I want tagged posts to be included but I don't want my search to be limited to them. Also, when I enter two search terms I expect to search for both of them, the system shouldn't eat one of them. Finally, the search bar and the search page should return the same results.  Note that this is not the same as the bug described in  since the search terms here were not entered as tags but as strings. This means we have multiple bugs:  Non-logged in users who search for two tags, only get results for one (which is addressed in the post above); Search strings that happen to be tags are automatically converted to tags when searching (foo becomes [foo]) which is not always what one wants, but which might be . Search strings that happen to be tags are removed when non-logged in users search.
When I input [asdf][lisp] into the search field on , without being logged in, only one tag remains. Is it broken?
Added activities, now names and labels and strings aren't registering Android Manifest file I noticed that $f(x) = x\phi(x)$ seems to be one-to-one, where $\phi(x)$ is Euler's Phi function.  In particular, I'm writing some numerical python code and the line I have looks something like  sorted([n*phi(n) for n in range(1,1000)])   and there are no duplicates in the list.  First, is it one-to-one?  Second, if it is, is there a simple proof sketch? What is a fragment in a fragment shader? Wikipedia says that:     In general, a fragment can be thought of as the data needed to shade the pixel, plus the data needed to test whether the fragment survives to become a pixel (depth, alpha, stencil, scissor, window ID, etc.)   So is it textures, vertices or something else? Conjugate class in the dihedral group The vertical line at the end of the cell where i used cell merge is missing. How to remove \n from a list element? Use fixed keyboard for a given app I would like to tell my Android that when I'm in a given app it should switch to a given keyboard. My use case is that I want to use Hacker keyboard with Connectbot. Is there a easy way to test ubuntu on new notebooks before buying it? Is there an easy way to check a notebook's hardware compatibility with ubuntu before you buy it?  I really don't want to buy a notebook home and find several bugs caused by the hardware.  I know that DELL has some notebooks which are pre-installed ubuntu12.04LTS, i.e. the new xps. But what about other notebooks? isn't there a way to quickly check a notebook's compatibility with ubuntu?  A way I can see is using a LiveCD/ubuntu stick and boot in ubuntu first, then run some tests. But the problem is: how to make these tests in a short time automatically??? and how can I check the hardware compatibility? I know that I can use lshw or hardinfo to get informations, but only having the information is not enough, there are still some possibilities that your hardware has a bug. For instance, Lenovo T410i's wireless driver has a bug which causes extremely low speed internet connection, I googled a lot and recompiled the driver to fix that bug. So this is the kind of situation I'm trying to avoid.  Any help is appreciated. Include ALL pdf graphics in document I have several plots saved as .pdf in a folder and I would like to know if there is a way of adding all of them in a document at once, without typing the path to each file. How can i make the grass bend when this cube hits it?  Here's the picture: Suppose we have a random variable $X \sim f(x|\theta)$. If $\theta_0$ were the true parameter, the the likelihood function should be maximized and the derivative equal to zero. This is the basic principle behind the maximum likelihood estimator.   As I understand it, Fisher information is defined as   $$I(\theta) = \Bbb E \Bigg[\left(\frac{\partial}{\partial \theta}f(X|\theta)\right)^2\Bigg ]$$  Thus, if $\theta_0$ is the true parameter, $I(\theta) = 0$. But if it $\theta_0$ is not the true parameter, then we will have a larger amount of Fisher information.   my questions    Does Fisher information measure the "error" of a given MLE? In other words, doesn't the existence of positive Fisher information imply my MLE can't be ideal?  How does this definition of "information" differ from that used by Shannon? Why do we call it information? 100 apples are/is considered as a large number of apples Signed to unsigned conversion in C - is it always safe? Could it be a structure of "How many -singular noun- is there?" We had an argument in our collage if it's possible to have such structure:     "How many -singular noun- is there?"   For example:      How many chair is there?   The claim of the supporters: This structure should be used in case that t is not known whether there is one one or more chairs there. While just in case that it is known certainty that there are more than one chair, it should be "how many chairs are there".    The claim of the opponents: This structure cannot be since using the phrase "how many" always should be with a plural noun.  Both sides are not native English speakers, then I would like to know what is the truth. What is involved in converting a PC video card to have boot screen on the Mac? I've got a PC video card that I'd like to get boot screen support for on my Mac Pro. In particular, it is a Gigabyte R9 270X. The card is supported on the Mac once it boots, but I would like to get boot screen back since my old 8800GT has been baked in the oven a few too many times by now :-)  I've seen numerous guides on the internet about flashing the BIOS on the video cards and also ones that speak about adding the EFI BIOS, but in the haphazard forum approach, it isn't clear how this all works. To some degree, I've recently come away with the notion that you don't get rid of the existing BIOS, but rather add an EFI partition to it that the Mac would recognize. If that assumption is correct, then it would lead me to believe that adding an EFI BIOS that works on a similar card (R9 280X or 7950 which are both close but not quite) should work since I'm assuming that the existing BIOS would be similar enough to hook in. Failing that, I'm not clear how you would get a card-specific EFI BIOS for boot screen support.  Anyone an expert on this? I'm just really having a hard time trying to sift through all this and hoping to get a more direct answer! Sum of columns for rows containing a specific term On OpenBSD and with OpenBSD's  and , is it possible to store the  of a user in a  repository of the same user?  What would be the proper way to accomplish something like this?  (To steer the answer into the correct direction, I would not be opposed to changing some permissions in the system, although I'd rather not have to recompile the binaries, nor violate any good security paradigms.) Joel Spolsky asked what rhymes with orange. The official answer is, "Nothing," although a creative poet can get close by using half words, just the -nge part or resorting to place names and foreign words.  Does orange somehow violate the basic phonotactics of English? (And hence we wouldn't expect other English words to rhyme with it?) Where does the partial derivative come from in Sakurai's derivation of the momentum operator? How is the momentum operator derived in Dirac formalism? I am reading Quantum Mechanics by Sakurai and he gives the following derivation. But I don't understand how he goes from the third equation to the last equation in (1.7.15). What I don't understand is where the partial derivative with respect to $x^{\prime}$ comes from. Here is the derivation from the book.     Momentum Operator in the Position Basis      We now examine how the momentum operator may look in the $x$-basis - that is, in the representation where the position eigenkets are used as base kets. Our starting point is the definition of momentum as the generator of infinitesimal translations:      $$\begin{align} \biggl(1 - \frac{ip\Delta x'}{\hbar}\biggr)\lvert\alpha\rangle &amp;= \int dx' \mathcal{J}(\Delta x')\lvert x'\rangle\langle x'\lvert\alpha\rangle \\ &amp;= \int dx' \lvert x' + \Delta x'\rangle\langle x'\lvert\alpha\rangle \\ &amp;= \int dx' \lvert x'\rangle\langle x' - \Delta x'\lvert\alpha\rangle \\ &amp;= \int dx' \lvert x'\rangle\biggl(\langle x'\lvert\alpha\rangle - \Delta x'\frac{\partial}{\partial x'}\langle x'\lvert\alpha\rangle\biggr).\tag{1.7.15} \end{align}$$      Comparison of both sides yields      $$p\lvert\alpha\rangle = \int dx'\lvert x'\rangle\biggl(-i\hbar\frac{\partial}{\partial x'}\langle x'\lvert\alpha\rangle\biggr)\tag{1.7.16}$$      or      $$\langle x'\rvert p\lvert\alpha\rangle = -i\hbar\frac{\partial}{\partial x'}\langle x'\lvert\alpha\rangle,\tag{1.7.17}$$ How do I create a Windows 7 USB installer with preinstalled software? I was wondering if it was possible to make a bootlable image of a Windows 7 Pro OEM Installation CD that I have and put it on an USB stick for faster/easier installation. I am asking because we have a couple of PC´s where I´d have to install the OS using the same key (MAK).  Also is it possible to kind of populate that image with software that would have to be installed anyways on all machines (like Chrome, Outlook, etc)?  It would be really helpful to just install a Windows 7 image with customized software already installed. I would just make an image of an OS and use that, but the hardware of the machines differ.