Ordering two lists separated by spaces side-by-side
Join lines from two files
A question about eigenvalues of $5\times5$ matrix scrlttr2: Position of the recipient's address If a stock doesn't pay dividends, then why is the stock worth anything? I read somewhere that companies are not required to pay dividends to shareholders (this is correct, yes?).   If so, then if company A never pays dividends to its shareholders, then what is the point of owning company A's stock? Surely the right to one vote for company A's Board can't be that valuable.   What is it that I'm missing? When I go to localhost/phpmyadmin I get the apache "Not Found" error (404). However, I can load html pages, and run php pages (such as &lt;?php phpinfo(); ?&gt;). And phpmyadmin is installed.  balter@homedevbox:~$ aptitude search phpmyadmin i   phpmyadmin                                               - MySQL web administration tool   I also installed the standard ubuntu LAMP stack and set passwords for mysql and all that.  What could be the problem?  EDIT: Here is where my phpmyadmin files are.  balter@homedevbox:/var$ cd / balter@homedevbox:/$ sudo find . -type d -name phpmyadmin ./var/lib/mysql/phpmyadmin ./var/lib/phpmyadmin ./etc/phpmyadmin ./usr/share/phpmyadmin ./usr/share/dbconfig-common/scripts/phpmyadmin ./usr/share/dbconfig-common/data/phpmyadmin ./usr/share/doc/phpmyadmin What posts should be escalated to staff using [status-review], and how do I escalate them? 14.04.5 to 16.04 Update failed - xenial.tar.gz.gpg missing The update from Trusty to Xenial is officially available via the software updater. After updating all packages, upgrading through the software updater yields:  Fetching the upgrade failed. There may be a network problem.   Doing a sudo do-release-upgrade yields:      Checking for a new Ubuntu release Err Upgrade tool signature                                                        403  Sorry, not allowed to fetch that type of file: xenial.tar.gz.gpg         Err Upgrade tool                                                                  403  Sorry, not allowed to fetch that type of file: xenial.tar.gz             Fetched 0 B in 0s (0 B/s)                                                       WARNING:root:file 'xenial.tar.gz.gpg' missing Failed to fetch Fetching the upgrade failed. There may be a network problem. Is it easy to enter the UK multiple times on the same Business Visitor Visa? I got a business visitor visa, sponsored by a company, for a 4-5 day visit. The visa was provided for a period of 6 months, with multiple entry possible.   First, what should I carry with me when entering the UK (at LHR)? Will they just take a look at my visa and let me in, or will I have an interview or something? (I haven't seen indication that I should carry documents or anything with me, but I thought I'd ask).  Second, if I want to re-enter the UK in a month or two (not for a business purpose), can I do that on the same visa, since it's multiple entry? Or is the second entry different than the first (i.e. if the first doesn't have an interview, they'll have an interview on the second entry?) Transitive subgroup of symmetric group $S_n$ containing an $(n-1)$-cycle and a transposition I have no root access on this machine.  I would like to know if there is a way I can download Ubuntu packages and install them as non-root?  Probably in my ~/bin or ~/usr/share or something like that? Would that work? context menu parent? How can I prove that the following summation converges? $$\sum_{n=0}^\infty \sum_{k=0}^n \frac{(-1)^n}{(k+1)\times (n-k+1)}$$  I tried to prove that by proving that the following summation in in absolute value converges so the original one converges too, but that's incorrect.  Any other ideas? I read this short story about 20 years ago, and I'd love to find the title and author. This is what I can recall about the story:   It takes place in a classroom full of kids (around 10 years old?) The planet always gets rain The kids lock the main character (a girl, I think) in the closet during the very rare occurrence of sunlight and she misses the entire event.    I know it's not much to go on, but I hope it rings a bell for someone! I'd like to setup a WCF service to send emails. The System.Net.MailMessage doesn't seem to be serializable, and cannot be passed in a [DataContract]  The error I receive is      Type 'System.Net.Mail.MailAddress'   cannot be serialized. Consider marking   it with the DataContractAttribute   Any suggestions? A Hilbert space is, by definition, a complete inner product space. If $(V,|.|)$ is finite dimensional inner product space of dimension $n$ then it is (topologically) isomorphic to $\mathbb{R}^n$ which is of course complete. My instinct here is to say "and therefore, $V$ is also a Hilbert space". I'm not sure about this step however since completeness depends on the norm and the norm depends on the selected inner product (assuming the induced norm $||x|| = (x | x)^{1/2}$ is used). So, must we place some condition on the inner product or is the topological isomorphism between $\mathbb{R}^n$ enough to guarantee that V is Hilbert? Is there any hint that the MoM or anywhere else got support in combating voldemort the first time around? Or is everything completely UK-centric?  I can't remember anyone in the second war being specifically sent from europe to help, even though we see international wizards in book 4. But I don't think all the events of the first war are covered in the books.  So are other bodies like the MoM involved in the first war, or was it isolated in the UK? Why does Jack let Walt go? In Breaking Bad S5 E14, Jack not only lets Walt go, but also leaves a barrel of money to him after killing Hank. I don't understand why he would do this. Jack says that, with 7 barrels of money, he doesn't need to cook meth any more, so there is no reason to keep Walt (the witness of the killing) alive, let alone to give him so much money. What's the rationale behind this? Or it's just mercy or respect? Prove: $|a\sin x+b \cos x|\leq \sqrt{a^2+b^2}$ $$|a\sin x+b \cos x|\leq \sqrt{a^2+b^2}$$   I have tried: $$|a\sin x+b \cos x|\leq |a+b|\leq \sqrt{a^2+b^2}$$  enough to prove: $$|a+b|\leq \sqrt{a^2+b^2}$$  But I can find how to continue from here How can I get a more traditional drop-down like menu for Unity? Eigenspace of the companion matrix of a monic polynomial How do I prove that the eigenspace of an $n\times n$ companion matrix  $$ C_p=\begin{bmatrix} 0 &amp; 1 &amp; 0 &amp;\cdots &amp; 0\\ 0 &amp; 0 &amp; 1 &amp;\cdots &amp; 0 \\ \vdots&amp;\vdots &amp;\vdots&amp;\ddots&amp;\vdots\\ 0 &amp; 0 &amp; 0 &amp;\cdots &amp;1 \\ -\alpha_0 &amp;-\alpha_1 &amp;-\alpha_2 &amp;\cdots&amp;-\alpha_{n-1} \end{bmatrix} $$ equals $\operatorname{Span}\{v_{\lambda} \} $ where $v_{\lambda}$ is an eigenvector of the companion matrix w.r.t. the eigenvalue $\lambda$: $$ v_{\lambda} =  \begin{bmatrix} 1 \\ \lambda\\ \lambda^{2} \\ \vdots\\ \lambda^{n-1} \end{bmatrix}. $$ About the absence of metal in machinery and buildings of the past