I have a question, I posted that on one site, but they consider it more of a career advice question. I am unable to find if there any site of this type?
The  specifically says not to ask  for career advice but people do it anyway.  Should I consider the Help Center outdated or only loosely enforced?    And what about a career advice site on the network?  There are 70+ sites, and most of them are for relatively narrow interests (which is not a criticism, I enjoy looking through the many sections).  A career section seems like it would be very popular.  Also, a careers section would help keep career questions off the other sites.
Given  $$ y_n=\left(1+\frac{1}{n}\right)^{n+1}\hspace{-6mm},\qquad n \in \mathbb{N}, \quad n \geq 1. $$ Show that $\lbrace y_n \rbrace$ is a decreasing sequence. Anyone can help ?  I consider the ratio $\frac{y_{n+1}}{y_n}$ but I got stuck. How to disable the skype ads (advertisement)? Prove that the additive groups $\mathbb{R}$ and $\mathbb{Q}$ are not isomorphic. Is there a better (or other) way(s) to prove the following statement? Also, the same argument works for multiplicative groups $\mathbb{R}-\{0\}$ and $\mathbb{Q}-\{0\}$, right?       Problem Prove that the additive groups $\mathbb{R}$ and $\mathbb{Q}$ are not isomorphic.   Solution By cantor's diagonal argument, there is no possible bijection between $\mathbb{Q}$ and $\mathbb{R}$. Since an isomorphism needs to be a bijection, there is no possible isomorphism between the additive groups $\mathbb{R}$ and $\mathbb{Q}$.    Thanks Passing an array as a function parameter in JavaScript Why do light sources appear as stars sometimes? See for example this photo:    From my experience, the longer the exposure the stronger can this effect be observed. Is this correct? Are there any other factors that influence the creation of these stars (is there a better word for it, by the way?) And what exactly does technically happen? Proper use of the IDisposable interface I know from reading  that the "primary" use of the IDisposable interface is to clean up unmanaged resources.  To me, "unmanaged" means things like database connections, sockets, window handles, etc.  But, I've seen code where the Dispose() method is implemented to free managed resources, which seems redundant to me, since the garbage collector should take care of that for you.  For example:  public class MyCollection : IDisposable {     private List&lt;String&gt; _theList = new List&lt;String&gt;();     private Dictionary&lt;String, Point&gt; _theDict = new Dictionary&lt;String, Point&gt;();      // Die, clear it up! (free unmanaged resources)     public void Dispose()     {         _theList.clear();         _theDict.clear();         _theList = null;         _theDict = null;     }   My question is, does this make the garbage collector free memory used by MyCollection any faster than it normally would?  edit:  So far people have posted some good examples of using IDisposable to clean up unmanaged resources such as database connections and bitmaps.  But suppose that _theList in the above code contained a million strings, and you wanted to free that memory now, rather than waiting for the garbage collector.  Would the above code accomplish that? Crash adding comment The SE iOS app crashes when adding comments to certain posts.  It was discovered to be if the "Add an Answer" button was visible, not just responding to a deleted comment.  Edited to match answer. Previous steps were not the only use case, and this error keeps getting re-reported in different ways. Why can't I log into minecraft with a mojang account? I created a Mojang account and downloaded the Minecraft launcher, but when I started it up, I couldn't log in. Since the log in fields did not require a username, I tried typing in my email, and still couldn't log in. I've tried after resetting my password, but that didn't work either. What am I supposed to do to log in and play? Can I run out of disk space by creating a very large number of empty files? It is well-known that empty text files have zero bytes:    However, each of them contains , which according to my research, is stored in , and do use space.   Given this, it seems logical to me that it is possible to fill a disk by purely creating empty text files. Is this correct? If so, how many empty text files would I need to fill in a disk of, say, 1GB?    To do some checks, I run df -i but this apparently shows the % of inodes being used(?) rather than how much they weigh.  Filesystem             Inodes  IUsed    IFree IUse% Mounted on udev                   947470    556   946914    1% /dev tmpfs                  952593    805   951788    1% /run /dev/sda2            28786688 667980 28118708    3% / tmpfs                  952593     25   952568    1% /dev/shm tmpfs                  952593      5   952588    1% /run/lock tmpfs                  952593     16   952577    1% /sys/fs/cgroup /dev/sda1                   0      0        0     - /boot/efi tmpfs                  952593     25   952568    1% /run/user/1000 /home/lucho/.Private 28786688 667980 28118708    3% /home/lucho virtualbox crash on kernel 4.13.0-26 Ubuntu 16.04 LTS Virtualbox 5.0.40 ubuntu r 115130  Today after upgrading to kernel 4.13.0-26 guest vbox machines started to crash whole ubuntu. just hard poweroff is working.  If I startup with kernel 4.10.0-42 everything works fine.  what may be the problem ? Satisfying explanation of Aristotle's Wheel Paradox. The paradox:    We have a circle and there is another circle with smaller radius. They are co-centeric.  If circle make full turn without sliding, both smaller and bigger circle make full turn too. If we assume that the passed road is equal to the circumference of circles. We have got smaller circle's radius is equal to bigger one's.  Unsatisfying Solutions I found:    "Do not assume that smaller circle's circumference is equal to passed road since the surface that contacts to the ground is bigger one. " // Okey but it does not explain the paradox, it explains just what is the wrong assumption (even does not explain why it is a wrong assumption.) It is undeniable that every point on both smaller and bigger circle will contact exactly one and only one point on their path. Therefore we can think that this is a bijective maps and smaller circle is isomorphic to bigger one. (Okey but ....)   Question: What is the true answer? What is wrong with the definition of circumference of a circle and relationship with its taken path. How to give permissions to specific command? I would like to run fastboot command without sudo. it's working if I put sudo in front of it, otherwise it wont.  like this:  $ sudo fastboot devices 2738006a    fastboot  $ fastboot devices no permissions  fastboot   How do I solve this? Extend x axis on graph? I'd like to extend my x axis a little longer. Is it possible to do that?  \centering     \begin{tikzpicture}[scale=1.5]      \begin{axis}[         xlabel=Reynolds Number,ylabel=Coefficient Discharge]     \addplot [color=blue,mark=*] coordinates {         (6485.41491,0.408143397)         (7927.942858,0.407370795)         (8663.115504,0.38550864)         (9219.462371,0.366953133)         (9537.374867,0.346531912)         (10491.11235,0.330115983)         (11087.19828,0.312041115)         (12219.76155,0.313951177)     };         \addlegendentry{1/4}     \addplot [color=red,mark=triangle] coordinates {         (6556.945221,   0.412644978)         (7868.334265,   0.404307857)         (8663.115504,   0.38550864)         (9187.671122,   0.365687778)         (9120.114717,   0.331371141)         (10443.42548,   0.328615455)         (11683.28421,   0.328817519)         (12875.45607,   0.330797337)     };         \addlegendentry{1/2 Lift}     \addplot [color=black,mark=*] coordinates {         (6843.066467,   0.430651305)         (8297.516134,   0.426361012)         (9203.566747,   0.40955872)         (8615.42863,    0.342911376)         (9298.940495,   0.337868614)         (10824.92047,   0.340619673)         (11683.28421,   0.328817519)         (12899.29951,   0.331409925)     };         \addlegendentry{3/4 Lift}     \addplot [color=yellow,mark=*] coordinates {         (6854.988186,   0.431401568)         (8398.850742,   0.431568008)         (9267.149246,   0.412388141)         (8567.741755,   0.341013343)         (9346.62737 ,   0.339601273)         (10753.39016,   0.338368882)         (11897.87515,   0.334857025)         (13030.43841,   0.334779157)     };         \addlegendentry{Full Lift}     \end{axis}% \end{tikzpicture}% What are PPAs and how do I use them? I keep reading about  ('PPAs') and people answer questions with a link to a PPA. What's the best way to use these?     There are multiple valid answers for this question spanning over several versions of Ubuntu. For your convenience, an index of each is below. How do I reset my main keychain and completely delete the old one? I changed my password and its been coming up with all of these popups asking for my new password when I first login. If anyone can help with updating my keychain I would appreciate it or you can just help me completely delete and reset it. Boot to console (standard method fails) I'm trying to get Ubuntu to boot directly to the console. I don't want to completely remove the GUI because I still kind of need it for training wheels sometimes, but I don't want to deal with it if I don't need it. In the past I have been able to achieve this pretty easily in previous versions by editing /etc/default/grub, but for some reason it's not working on 15.10. Here is my /etc/default/grub file: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: #   info -f grub -n 'Simple configuration'  GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2&gt; /dev/null || echo Debian` #GRUB_CMDLINE_LINUX_DEFAULT=&quot;quiet splash&quot; GRUB_CMDLINE_LINUX=&quot;text&quot;  # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM=&quot;0x01234567,0xfefefefe,0x89abcdef,0xefefefef&quot;  # Uncomment to disable graphical terminal (grub-pc only) GRUB_TERMINAL=console  # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480  # Uncomment if you don't want GRUB to pass &quot;root=UUID=xxx&quot; parameter to Linux #GRUB_DISABLE_LINUX_UUID=true  # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY=&quot;true&quot;  # Uncomment to get a beep at grub start GRUB_INIT_TUNE=&quot;480 440 1&quot;  As you can see, I have commented out quiet splash, changed the value of GRUB_CMDLINE_LINUX to &quot;text&quot;, and uncommented GRUB_INIT_TUNE. However, the only thing that seems to make a difference is the quiet boot. When I add and remove the hash from that line it affects the behavior when the machine boots, so I know grub is updating when I tell it to. But no matter what I do it still loads the GUI immediately. What pins on a nRF51822 do I connect to a STM32 programmer? 3rd iterate of a continuous function equals identity function Reduce spacing between subequations Which SUSY models are affected by the recent LHCb result? The LHCb has recently  the observation of $B_s \rightarrow \mu^+ \mu^-$ with a branching ratio that agrees with the Standard Model (SM). There are many blog posts about it (See: ).  The result initiated a debate over its implication on Supersymmetry in general, which I don't want to discuss here. But it certainly affects some Supersymmetric models that may have a different prediction than that of the SM.   My questions are,   Which models in particular are affected (or variants of models)? What is the MSSM status? The NMSSM? Does the result affect some of the parameter space of a particular model, or does it rule out an entire model/or variant of a model?