Which browser will let me login say to website if I open number of different instances, with different login credentials(hence storing cookie to instance cache instead of global browser cache).
By default, all browser instances use the same cookie for the same site. Is there a browser that doesn't follow this?  Or is there a Firefox plugin that can "wear" different cookies for a specific site?
The problem is to prove the following equivalence:  $$2^{\aleph_0}=\aleph_1 \iff \exists\ A,B\in\mathbb{R}^2:\\ \textrm{a)}A\cup B=\mathbb{R}^2 \\\textrm{b)}\ \forall\ \textrm{lines } l\ \textrm{parallel to x-axis, } |A\cap l|\leq\aleph_0 \\\textrm{c)}\ \forall\ \textrm{lines } l\ \textrm{parallel to y-axis, } |B\cap l|\leq\aleph_0$$  I think I know how to prove "$\impliedby$":  Let's assume the RHS and that $2^{\aleph_0}\geq\aleph_2$. Now let's take a sequence $\langle x_{\alpha}:\ \alpha&lt;\omega_1\rangle$. Since $\bigcup_\limits{\alpha&lt;\omega_1}|B\cap x_{\alpha}|\leq \aleph_1\cdot\aleph_0=\aleph_1$ there is such a $y$-coordinate that neither of $(x_{\alpha},y)$ is in $B$. But hence we obtain $\aleph_1$ point which all lie on the same line parallel to $x$-axis. Since $A\cup B=\mathbb{R}^2$ they all must be contained in $A$ $-$ a contradiction as $A$ has at most countably many of those points.  But what about the other implication? Do I contruct these sets by induction? Over all lines or something else? I haven't come up with anything yet, perhaps you could help me. A lot of people will probably gloss over this fact, but it looks like C-3PO meets BB-8 for the first time in this scene 0:20:                                But how does C-3PO know BB-8's name? Is there a time where C-3PO meets BB-8 before this and knows his name? What's the difference between cards, panels, and tiles? It seems as if with some of the modern front-end development frameworks there is a blur between the different types of 'container' elements. Whether this is an attempt to abstract the design from implementation or if this is due to there not being any standardization of terminologies I am not sure, but it leads to the fact that in some design frameworks I see the term panels being used but not cards (e.g. Bootstrap 3) while in others the term cards exists but not panels (e.g. Iconic), and perhaps both exist in others?  From a design perspective, it seems that both cards and panels are just containers, and since there's nothing that defines how big a card can get and how small a panel can be, I am wondering whether there's really any difference. From an implementation perspective, it seems that cards should be used for smaller size design elements and are preferred on mobile specific applications, whereas panels are used for a wider range of design elements and are preferred on desktop specific applications.  Is there any evidence/reference/examples that will help to illustrate or highlight the (lack of) differences? For some reason I think cards and tiles are more closely related to each other, and that panels seem to be in a slightly different class/family?  If we take the argument that there are no differences, then it is hard to understand why people associate 'tiles' with Microsoft 'Metro' style home pages, while on Google and Android apps it is 'cards' and for Java and Gnome applications it is 'panels'. Perhaps there are some contextual or implementation differences?  UPDATE: with the release of Bootstrap 4, it seems like cards are basically equivalent to panels (since one component has replaced the other), but with this comes the cost of having to maintain a more flexible container that will make it difficult to implement consistently. According to Bootstrap:      A flexible and extensible content container. It includes options for   headers and footers, a wide variety of content, contextual background   colors, and powerful display options.   FURTHER UPDATE: It seems as if Bootstrap 5 and Material.io have adopted the card UI component in the new world of responsive and mobile first/multi-device ecosystem design systems while "tiles" have a very specific meaning in the Microsoft Fluent Design System:      A tile is an app's representation on the Start menu. Every app has a tile. When you create a new Universal Windows Platform (UWP) app project in Microsoft Visual Studio, it includes a default tile that displays your app's name and logo   Panels don't seem to be part of the vocabulary anymore, as least in terms of a UI component, but in the Microsoft and Java world it still represents an abstract concept of organisation layouts of UI components. Almost every time I turn my XBox on and start up Fallout 4, I am unable to use the "Continue" option because the most recent save is corrupt.  I instead use the "Load" option. Here, I can see that the last save I manually performed is perfectly fine, and load it with no problem. However, there is an additional, corrupt save with the same time stamp immediately after it.  This doesn't happen quite every time, but often enough that I'm surprised when there's no corrupt save waiting for me to delete it.  I've tried a few things to solve this, including exiting to the game's main menu before turning the XBox off, going out to the guide before turning the XBox off, turning it off immediately after saving, and waiting a while after saving.  Why do I get all these corrupt saves? Do others have this problem? How do I fix it? Let $K/F$ be a finite field extension and suppose that $F$ is infinite. Is it possible to have a nonzero polynomial $p \in K[x_1,...,x_n]$ that vanishes in $F^n$? How can I create a /dev/null-like "blackhole" directory? I would like to create a "/dev/null" directory (or a "blackhole" directory) such that any files written to it are not really written, but just disappear.   I have an application that writes out large temporary files to a directory. I have no control over the name of the files and I don't really care about the content of these files. I could write a script that periodically clobbers these files, but the files are written out very quickly and fill my disk. I'm looking for something cleverer. I want the application to "think" that it is writing out these files, when in fact, the writes are just being discarded at the other end.  Also see  old related thread. Is it possible to recursively instance object particles? How to use a special character as a normal one in Unix shells? Many questions like 'How to type the double-quote char (")?' are being asked, and we don't want to clutter our community with the same answer (Type it as \" if not enclosed in 's, " if enclosed in 's.) So, the question is here.   You can't type special chars into a terminal like normal ones, e.g. this command will fail:  echo Updates (11)   So, how to type in these chars in the terminal as if they were normal ones?  !#$^&amp;*?[](){}&lt;&gt;~;'"\|&lt;space&gt;&lt;tab&gt;&lt;newline&gt; So I finally killed the Ender Dragon! As I was climbing the portal back to the world, I noticed that on top of the column there was an egg. So I attacked, mined, clicked and nothing happened, it just teleported away. What does the egg do and how do I get it? How to place a .png texture with transparency over a material $2\cos^2x=1+\sin x$.  Determine the exact values of $x$ such that $0 \leq x \leq 2\pi$.    I am experiencing problems with factoring this question.  First I started by getting everything on to the left side so: $2\cos^2x-\sin x-1=0$.  Then seeing as there are two trig variable here ($\cos$ and $\sin$), I used the pythagorean identity and replaced $2\cos^2x$ with $1-2\sin^2x$ to make it into a one variable question: $1-1-2\sin^2x-\sin x-1=0$.   By collecting like terms it then becomes $-\sin^2x-\sin x=0$.  Now you could factor these with $0$ and $-1$, but then it creates uneven brackets so this musn't work.  I don't think the quadratic formula is necessary, but I am wondering if this could be treated as a difference of squares question.    If you replace the $\sin x$ and make the question into $-x^2-x=0$ it is a little easier to look at, however I am not sure if this is the right approach.  If someone could please clarify my answer, that would be appreciated! I have some questions with string theory:   Why is it that there is exactly 4 large spacetime dimensions while the rest remain small? It is a nonlocal QFT. How could that fit in GR? Smart Phone's camera socket I just want ask how the socket in the image is called?   I couldn't really find and the closer I could get is only Raspberry's module. Vertical spacing in floats I am using a float inside the text. As I found out, using \intextsep I could set space above and below the float and the texts. But when I am using \setlength{\intextsep}{5mm}, the space below the float is more than the one above it. Why they are not equal?  % Preview source code  %% LyX 2.0.0beta1 created this file.  For more info, see http://www.lyx.org/. %% Do not edit unless you really know what you are doing. \documentclass[english]{report} \usepackage[T1]{fontenc} \usepackage[latin9]{inputenc} \setcounter{secnumdepth}{3} \setcounter{tocdepth}{3} \usepackage{graphicx}  \makeatletter  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands. %% A simple dot to overcome graphicx limitations \newcommand{\lyxdot}{.}   %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands. \usepackage{setspace} \setlength{\intextsep}{5mm} \setlength{\belowcaptionskip}{0mm}  \setstretch{2}  \makeatother  \usepackage{babel}  \begin{document} Text Text Text Text Text Text Text Text Text Text Text Text  \begin{figure}[h] \begin{centering} \includegraphics[scale=0.5]{\lyxdot \lyxdot /Pictures/fedora} \par\end{centering}  \caption{}  \end{figure} Text Text Text Text Text Text Text Text Text Text Text Text \end{document} Can I travel to Croatia with single-entry Schengen visa? I am traveling to Zurich with a single-entry Schengen visa.  While coming back can I travel to Croatia for 3 days and then return to India (Country of Origin)? Is it possible in Minecraft to switch over from survival to creative in single player? I want to append this text:  &lt;Directory "/var/www/*"&gt;     Order allow,deny     Allow from all     AllowOverride All &lt;/Directory&gt;   to the file /etc/apache2/apache2.conf  I have access via SSH but I don't know how to use VIM. I would like to do this via a command. Is there a way to head/tail a document and get the reverse output; because you don't know how many lines there are in a document?  I.e. I just want to get everything but the first 2 lines of foo.txt to append to another document. How can you tell when a roast is done? How can you tell when a roast is done?  How long should they roast for? Is there a way to disable recovery mode so it won't be possible to factory reset your phone?  Basically what I am trying to do, is that it should be impossible to factory reset the phone as there is no recovery partition.  (Example format the recovery partition, or hide the option of factory reset on the recovery menu, build a custom recovery etc.)  P.S.. I was thinking of maybe removing a system app (example package installer) and making it a user app, and therefore when you factory reset the phone it won't start cause the system app is missing, but when I tried that, the phone wouldn't start even without resetting it, as the system needs the system app to start, ( I thought that maybe even though I removed the app from being a system app, the phone would still start as it's still there as a user app, and only after resetting the phone - that the user apps get deleted, the phone won't start as it's missing the app).  Thanks in advance