Is it possible to install an newer version of android for an old android device?
How do I update Android on my device?
Cannot change lock screen background on Ubuntu 18.04 How to do a generalized linear model with multiple dependent variables in R? Given a compact set $K$ and closed set $E,$ prove: $E\cap K\neq \emptyset $ Let $K\subseteq \mathbb{R}^n$ be a compact set and $E\subseteq \mathbb{R}^n$ a closed set, such that: $$\inf\{d(x,y):x\in K, y\in E\}=0$$ where $d(x,y)=\sqrt{\sum_j(x_j-y_j)^2}$ Prove: $E\cap K\neq \emptyset $  I tried to work with the definitions of compact and closed sets, and I understand that from what's given of the distance between elements in $K$ and $E$, that they are very close,  but couldn't really get further. Any help appreciated. How long do black olives last once opened? I opened a can of sliced black olives for my pizza and only used half. I put the leftovers into a sealed container with the liquid and put it in the fridge. Under those conditions how long will the olives last? Is there a better way to store leftover olives? I've read a great article about the . But there are still some points that are unclear.  Why do we say...   school project but not school's project? car service but not car's service or even cars' service (plural form)? apostrophe usage but not apostrophe's usage or apostrophes' usage? Renaming files in lexicographical order with a numerical pattern that increases sequentially with fixed padding I have files such as  a bb ccc abc emrls   I would like to rename them so that, after sorting them (for example, lexicographically), each file gets the following name:  00001 00002 00003 etc   where the # of digits for the 0 padding is specified a priori, e.g. 6 in the case above (assuming that we know how many digits are needed).  Since the shell I am most comfortable with is zsh, I'm interested in solutions that benefit from features on zsh (maybe using zsh's zmv?). I would also be interested in solutions that are compatible with Bash. Using my idle computer for something useful (seti@home and the like) How did Rita know she lost the power? In Edge of Tomorrow, Emily Blunt's character, Rita Vrataski, had the time-resetting power previously.  She details the backstory of how she gained it, and how she lost it.  However, how did she know when she lost the power?  It's only triggered when the wielder dies.  Obviously she didn't die after losing the power, so how did she know the power was gone? I am wondering whether there is any difference between a gerund acting as subject and an infinitive acting as a subject. Does anyone know of a script that can select all text references to URLs and automatically replace them with anchor tags pointing to those locations?  For example:  http://www.google.com   would automatically turn into  &lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt;   Note: I am wanting this because I don't want to go through all my content and wrap them with anchor tags. Some things are easier to implement just by hand (code), but some are easier through WF. It looks like WF can be used to create (almost) any kind of algorithm. So (theoretically) I can do all my logic in WF, but it's probably a bad idea to do it for all projects.  In what situations is it a good idea to use WF and when will it make things harder then they have to be? What are pros and cons/cost of WF vs. coding by hand? novel with psi slavery Triangle Inequality of the Cartesian product with Max function Let $(X,d)$ be a metric space.  Define $$d'((x,y),(z,w))=max\{d(x,z),d(y,w)\}.$$   I'm trying to prove the triangle inequality for this, but really don't have a clue how.  Any tips or suggestions would be greatly appreciated! Adjoint matrix eigenvalues and eigenvectors I just wanted to make sure that the following statement is true:  Let $A$ be a normal matrix with eigenvalues $\lambda_1,...,\lambda_n$ and eigenvectors $v_1,...,v_n$. Then $A^*$ has the same eigenvectors with eigenvalues $\bar{\lambda_1},..,\bar{\lambda_n}$, correct? Why do I get "Permission denied (publickey)" when trying to SSH from local Ubuntu to a Amazon EC2 server? Why do a lot of questions from around 2008 seem to have really high upvotes? I have seen this a lot but i ran into this question today:    And the answer (while good) has 83 upvotes which seemed a little over the top.  I see dozens of answers of this caliber every week that only seem to get a few upvotes.    Was there some sort of SO policy that encouraged people to upvote more during this period?  Am I just imagining that answers from this period received more votes than comparable ones now? Windows 10 - disable reopening programs after restart/startup Diacritics and non-English letters in anglicized loan words: keep 'em, dump 'em, italicize the words, or what? Remove items from one list in another I've been building my own emacs because I want to fix some issues in it and get the bug fixes upstream. However, Ubuntu keeps automatically removing my own built emacs and I have to keep rebuilding and reinstalling it.  Here's my output of apt-cache policy emacs when I went to bed last night:  ~/emacs$ sudo apt-cache policy emacs emacs:   Installed: 26.0.50.aaron-1   Candidate: 46.1   Version table:      46.1 500         500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages         500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages  *** 26.0.50.aaron-1 100         100 /var/lib/dpkg/status   Here it is when I wake up:  ~/emacs$ sudo apt-cache policy emacs [sudo] password for excelsiora: emacs:   Installed: 46.1   Candidate: 46.1   Version table:  *** 46.1 500         500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages         500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages         100 /var/lib/dpkg/status   Why is this package being versioned at 46 instead of 24 or 25? 26 is the currently the highest major emacs version you can get.   I can see that this is a meta-package:   Why is Ubuntu updating software without asking?  Main Question: What am I supposed to do - assign my package version a number higher than 46 just to make it stick?   That seems like a horrible hack, or maybe that's how it's supposed to work?