How to remove branch for a child
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How to set custom keyboard shortcuts from terminal? If $A\subset\mathbb{R^2}$ is countable, is $\mathbb{R^2}\setminus A$ path connected? Possible Duplicate:          As the topic,if $A\subset\mathbb{R^2}$ is countable, does $\mathbb{R^2}\setminus A$ path connected??? I know the answer is it is path connected but not sure how to prove it. Person falls into radiotelescope and his mind gets transported to the far future How do I get the linksys WUSB6300 wireless adapter to work on linux I'm using Bash on both client and server. When running a command over SSH:   ssh &lt;host&gt; 'declare' gives a list of shell variables. ssh &lt;host&gt; 'mount' gives a list of mountpoints.   However, declare is a Bash builtin, while mount is an external command. How does SSH know which to run if there is a shell builtin and an external command with the same name on the server? What is the term for the double consecutive use of a word with stress on one of the words to alter its severity? What is the term when a word is used consecutively twice, with intentional stress placed on the first word, as a means to alter the severity of the word's meaning?  I am not referring to a  (had had) or a  (that that), but to the slightly sarcastic use as demonstrated in shows like Seinfeld. Sample sentences, with emphasis:  I know we're going out to eat, but I am only going to pick at an appetizer because I'm not hungry hungry. Don't wear something so formal to the party; I don't think you need to be dressed dressed.  Of personal note, some of my relatives decided a few years ago to nick-name the term a &quot;Celaine&quot; (a combination of their names) due to their own frequent use of it. Note: This question explicitly requests the term of art used by linguists and English scholars when discussing this phenomenon. This question is different from a  which requests a historical explanation for the phenomenon described by this term. None of the answers to the suggested duplicate provide the term.  The author of the similar question requests the term for the pattern in a comment, but does not receive an acceptable answer. The only mention of an acceptable term is in a comment made by the author of this question, in response to the author of the similar question, directing back to this very question. I'd like to create a Windows bootable USB stick, but I don't have a Windows machine with me at the moment to do so. How could I achieve the same using Ubuntu? I'm trying to hide the app icon from the title bar in GNOME in Ubuntu 18.04. I know there is  asking the same thing but it's from 2011 and I can't find what it requires to find in the shell css. I'm also using the Arc-Dark custom theme.   Here are two examples of what I want to remove:      To be clear, I don't want to resize it to fit, I want to straight away remove it completely. Swapping right shift and delete key using xmodmap I'm unsure how to swap these 2, this is the thought process I had but am unsure how to get it working:  remove sh = Shift_R remove dl = Delete  keysym Delete = Shift_R keysym Shift_R = Delete  add sh = Delete add dl = Shift_R   This is based on the code I use to swap caps lock and control.  Any thoughts?  xmodmap output:  dan@lantea:~$ xmodmap -pke | grep Shift_R keycode  91 = Shift_R NoSymbol Shift_R keycode 119 = Shift_R NoSymbol Shift_R dan@lantea:~$ xmodmap -pke | grep Delete keycode  62 = Delete NoSymbol Delete Proof that the nth root of a rational s/t is irrational unless s and t are perfect nth powers I'm trying to prove that $\sqrt[n]{\frac{s}{t}}$ is irrational unless both s and t are perfect nth powers. I have found plenty of proofs for nth root of an integer but cannot find anything for rationals. Also trying to work up from the proofs I have found is rather difficult.  My lecturer wants me to prove this using uniqueness of prime factorisation but I also have no idea where to start with that.   Any help is greatly appreciated. How to restore default group/user ownership of all files under /var? I accidentally changed /var owner/group to my username and then changed it back to root, but not all the /var folders' owners are root, so is there anyway to change back owner/group of files/folders to default state?  Or at least those files/folders that are created by packages? Continuity of function mapping connected set to connected set As I navigate through physics stackexchange, I noticed .  Electrons radiate light when revolving around nucleus? Why is it so obvious?  Note that I do not know anything about quantum mechanics - and I just want classical stories. How do I find (or exclude) all directories and sub-directories matching a certain pattern (in Linux)? I have a Win 7/11.10 dual boot system with Grub 2 as the default bootloader. However, I want to make Windows bootloader the default bootloader (grub 'dos' like interface scrares the hell out of my sister) so when I start the PC I will have the following boot options: 1. Windows 7 2. Ubuntu  NB: A process to reverse this operation so Grub can be the default bootloader again will also be appreciated Can I skip over releases when upgrading? I'm tutoring high school students. I've always taught them that:     A charged particle moving without acceleration produces an electric as well as a magnetic field.   It produces an electric field because it's a charge particle. But when it is at rest, it doesn't produce a magnetic field. All of a sudden when it starts moving, it starts producing a magnetic field. Why? What happens to it when it starts moving? What makes it produce a magnetic field when it starts moving? How long would a 150 Farad Capacitor light up an LED I have a bright white LED from a flashlight. Aproximatley How long will it light up with a 150 farad 2.5 volt capacitor. Do I need a resistor? And if so how many Ω? The capacitor is a maxwell 150 farad 2.7 volt boostcap . Long lay over in Seoul. Do I need a visa as a Filipino citizen? I'm a Filipino immigrant from USA about to visit home in December.  I have a 14-hour lay over in Seoul,  South Korea.  Do I need a visa to leave the airport to do a little sightseeing? Derivation of Maxwell's equations from field tensor lagrangian I've started reading Peskin and Schroeder on my own time, and I'm a bit confused about how to obtain Maxwell's equations from the (source-free) lagrangian density $L = -\frac{1}{4}F_{\mu\nu}F^{\mu\nu}$ (where $F^{\mu\nu} = \partial^\mu A^\nu - \partial^\nu A^\mu$ is the field tensor).  Substituting in for the definition of the field tensor yields $L = -\frac{1}{2}[(\partial_\mu A_\nu)(\partial^\mu A^\nu) - (\partial_\mu A_\nu)(\partial^\nu A^\mu)]$.  I know I should be using $A^\mu$ as the dynamical variable in the Euler-Lagrange equations, which become $\frac{\partial L}{\partial A_\mu} - \partial_\mu\frac{\partial L}{\partial(\partial_\mu A_\nu)} = - \partial_\mu\frac{\partial L}{\partial(\partial_\mu A_\nu)}$, but I'm confused about how to proceed from here.  I know I should end up with $\partial_\mu F^{\mu\nu} = 0$, but I don't quite see why.  Since $\mu$ and $\nu$ are dummy indices, I should be able to change them: how do the indices in the lagrangian relate to the indices in the derivatives in the Euler-Lagrange equations?