Java Compile Error (HelloWorldApp); It shows "Error while writing" and "Access Denied"
Java Access Denied
pdf of a quotient of uniform random variables Suppose $x_1, x_2$ are IDD random variables uniformly distributed on the interval $(0,1)$.  What is the pdf of the quotient $x_2 / x_1$? Consider a set $A$ of $10$ integers, $A = \{a_1,a_2, \ldots ,a_{10}\}$. Prove that there is at least one subset of $A$ whose sum is divisible by $10$. Why is it so hard to do this in Java? If you want to have any kind of module system you need to be able to load JAR files dynamically. I'm told there's a way of doing it by writing your own ClassLoader, but that's a lot of work for something that should (in my mind at least) be as easy as calling a method with a JAR file as its argument.  Any suggestions for simple code that does this? How did the transdimensional Edo god (Edo lord) come to be the overseer of the Edo? Confusion with floating point numbers How do I mount an `img` created with /bin/dd of a hard drive? "How" vs. "that" in "You know how we have pizza on Thursdays, right?" From time to time I hear sentences like this:      You know how we have pizza on Thursdays, right?   Here, how doesn't mean exactly how those guys eat pizza, it is something like "that" in this context.   So what is the difference between using how, that or just skipping the conjunction? I get that some spells are "especially swift" to cast and thus have a casting time of "Bonus Action". But is there any reason I couldn't cast such a spell as my Action?   Does it make a difference if the idea is for the one spell to be cast all by itself on a turn or if the desire is to use another Bonus Action (possibly a spell) on the same turn? Rootspaces are $\mathop{ad}$ nilpotent In Harry Potter and the Cursed Child, why would anyone believe this rumor? From Harry Potter and the Cursed Child - Part I:     Scorpius Malfoy is talking with his best friend Albus Potter: SCORPIUS: So your dad thinks the rumors are true -- I am the son of Voldemort? ALBUS (nods): His department are currently investigating it. SCORPIUS: Good. Let them. Sometimes -- sometimes I find myself thinking -- maybe they're true too. ALBUS: No. They're not true. [...] Harry Potter and the Cursed Child, Part I - Act Two, Scene Sixteen, Hogwarts Library - Page 143 - Scholastic    Harry Potter and the Cursed Child picks up right at the point where Harry Potter and the Deathly Hallows leaves off, at the epilogue. It is nineteen years post-Hogwarts, and Scorpius Malfoy and Albus Potter are eleven-year-old first-years.   I'm about as good at math as J.K. Rowling (meaning I'm terrible at it!), so correct me if I'm wrong. Voldemort was killed at the Battle of Hogwarts in May of 1998. At least eight years post-Battle had to have passed before Albus and Scorpius were born (I'm estimating the boys were born in 2006). Voldemort would have had to have been alive in 2005/2006 in order to have ...      ... fathered Scorpius Malfoy.   As the wizarding world was fully aware of Voldemort's death in 1998, why would anyone even remotely believe that Voldemort is ...      ... Scorpius Malfoy's father?   I can understand the possibility of Harry believing the rumor because ...     ... his scar hurt, and his scar is Harry's connection to Voldemort.   But other than Harry, it doesn't make sense to me why anyone would believe such a ridiculous rumor. So, why? What does "\" mean in math In a Linear Algebra textbook I am reading, the following is stated: $b\notin \operatorname{span}(A \cup \{a\})\setminus \operatorname{span}(A)$. It does so without explaining what "$\setminus$" means. I apologize if this question does not belong here but I just want to understand what it means. I can close the question if someone just comments on its meaning. Windows does not mount USB NTFS superfloppy I have a Transcend Storejet external USB hard disk. This is not an SSD, but a mechanical disk with rotating plates. I have formatted the whole disk, without partitioning, as NTFS. I have used mkntfs tool under Linux.  When plugged into a Linux machine, the system sees a drive with two partitions (/dev/sdc /dev/sdc1 /dev/sdc2). However, as I know it is a partitionless disk, I can mount the whole device (mount -t ntfs /dev/sdc /mnt) and it works without any problems.  When plugged into a MS Windows XP machine, the systems sees a disk with two unformatted partitions, and it does not assign a drive letter to either the whole disk, nor to any of the partitions.  Would anyone know how to get MS Windows to mount my disk as a NTFS superfloppy?  I have already tried removing old USB mounting points and residual devices using 'DriveCleanup'. It did not help.  By the way, I also have an external Kingston USB SSD, also formatted as NTFS superfloppy, without partitioning. However, this one is recognized and mounted normally by MS Windows. The photon sphere is a spherical region in space where photons are forced to travel in an orbit at $r = \frac{3GM}{c^{2}}$.   Is it possible to detect these spheres?  What happens if I fall through it? What happens to a photon that tangentially hits the event horizon, wouldn't this also lead to a photon orbiting the black hole? EDIT Since neutron stars also might have a , do we know neutron stars that should have such a sphere? Prove: If $a$ and $b$ are odd integers, then $8\mid (a^2-b^2)$  So far I have: $$8\mid \left((2n+1)^2-(2m+1)^2\right)\Longleftrightarrow 8\mid \left(4n^2+4n+1-4m^2-4m-1\right) $$ Is this right so far? Where do I go from here? Step by step explanation please! When do I use a dot, arrow, or double colon to refer to members of a class in C++? How to solve "permission denied" when using sudo with redirection in Bash? Seeking alternatives to pgRouting for open source routing / network analysis? Can I exchange limit and differentiation for a sequence of smooth functions? Let $(f_n)_{n\in \mathbb N}$ be a sequence of smooth functions converging to some $f$.  Under what circumstances can I exchange limit and derivative?, i.e.  $$\lim_{n\rightarrow \infty} \frac{\partial f_n(x)}{\partial x} = \frac{\partial f(x)}{\partial x}$$ Equation of a line maintaining equal ratio distance between two points. Say I have two points. One at $A = (0, 0)$ and another at $B = (0, 10)$. I wish to derive an equation for a line that, for any point $P$ on the line, would equal a set ratio for the distance $P$ to $A$ and $P$ to $B$.  This is easy if the predetermined ratio for $A:B$ is $1:1$. I would create a line from $A$ to $B$, find its midpoint, then create an orthogonal line at the midpoint. Then at any $P$ on the line I know that the ratio distances from $P$ to $A$ and $B$ will be $1:1$.  But what if the ratio for $A:B$ is something like $11:18$?  This is for a positioning algorithm I am implementing - not for homework :)  EDIT: Note - If an exact formula is not possible, an approximation of the line out to $\pm 200$ from $A$ or $B$ is acceptable as values further from $A$ and $B$ will not be utilized anyway. A linear equation for the final result/approximation is ideal for speed in running multiple computations. Drag and drop not working inside Nautilus on Ubuntu 17.10