My reputation on Stack Overflow is reduced without any down-vote or any negative reputation points shown at . Two days ago my reputation was 951, I gained 4 points, but the total now is 943. Last night it was 951, in the morning it was 947, increased to 949 by afternoon and is now 943.      Update: I have checked Show deleted posts.   There isn't any downvote or anything in profile, but posts in which I participated (answered, edited or flagged) are deleted.  Is there a reputation point sloss of -2 when any post you answered or participated is removed?  This has only happened for past day.      Is this a bug?
My reputation rating on SO took this hit an hour ago, and it is due to what appears to be the simultaneous deletion of multiple questions.  I am uncertain why it happened, am concerned, and would appreciate an explanation.  Going to  shows that it was removed due to moderation.  Was a script run deliberately, or were we hit with a question deletion attack; what happened?  -12     today -2  1 hour ago  removed     How to send a 2d Vector over UDP in c++ -2  1 hour ago  removed     How do I use the Eclipse debugger to debug a Java application? -2  1 hour ago  removed     PHP string error; inconsistency with local and server -2  1 hour ago  removed     Unable to start the MySQL service after a server migration -2  1 hour ago  removed     How to use Java to print a text file on a ticket printer? -2  1 hour ago  removed     How can all of the ZBrush Obj files be imported to make a complete model?
How to determine an object's class? Let $X$ and $Y$ be independent $Exp(1)$-distributed random variables. Find the conditional distribution of $X$ given that $X + Y = c$ ($c$ is a positive constant).  this is my idea:  $$f_{X \mid X+Y}(x\mid c) = \frac{f_{X,X+Y}(x,c)}{f_{X+Y}(c) } $$  if this is the right definition then i might calculate the righthand side to obtain the distribution but Iam unsure How to convert ISO 8601 date (string) to Date? Extracting numbers from string field using Python Parser of ArcMap Field Calculator? I am trying to calculate field test2 with only the numeric values from a string field test. The entire script is like:    def makestr(test)      list=[]      for s in test:          if s.isdigit():              list.append(s)      for a in list:          str=''.join(list)     But I keep getting an error:    Any ideas? Possible to get type of an aliased type in c#? Type.GetType("System.String")   Is there a lookup for the aliases available somewhere?  Type.GetType("string")   returns null. Sometimes I see a comma after the proper name:     Hello Mr. Black,      In order to give you....   But my native language is not English and I think that the comma in this phrase should be placed before the proper name:      Hello, Mr. Black.      In order to give you....   What is the correct punctuation in English? how to run a winform from console application? How do I create, execute and control a winform from within a console application? Meridian convergence. True north, magnetic north and grid north I'm having difficulty wrapping my mind around meridian convergence, the horizontal angular distance between true north and grid north.   Say I want to determine if a feature lies to the east or west of the central meridian (CM) by using true north and grid north designations on a topo map.   I realize grid north is parallel to the CM, while true north points to the poles, and magnetic north is the direction a compass points and constantly changing.   Looking at the figure below, I see grid north points to the east of true north. So does this fact alone mean everything on the grid is to the east of the true north, and therefore the CM? Does this simple fact mean that features in this grid lie to the east of the CM, or am I missing something.   Also, I realize I can just look at the tick marks and and see that this this grid in particular covers -80°22’ to -80°15, and the CM for zone 17R lies at 81°. But had I not known that and wanted to use the north arrows. Please explain. Why won't my follower follow me after the "A Night to Remember" quest line? At the end of the "A Night to Remember" quest line, my follower came with me when I was teleported to the Misty Grove. Once there, I told my follower to wait.  Now, when I was teleported back to the real world, my follower's not with me: presumably because he's still waiting at the Misty Grove. I've waited for some time and still he hasn't come back.  How can I get my follower back? Winsock2's select() on fd 0 (stdin) fails Why do my xmodmap binds involving AltGr only work on some keys? I want to remap my AltGR+Right_Windows but I can't figure out how. No matter what I try, pressing the right windows key emits the name keysym when right alt is pressed or not.  These are the contents of the xmodmap file I am testing right now. In my keyboard, 38 is the keycode for "a", 48 is the keycode for aportrophe/doublequote and 134 is the keycode for the right windows key.  keycode  38 = 1 2 3 4 5 6 7 8 keycode  48 = 1 2 3 4 5 6 7 8 keycode 134 = 1 2 3 4 5 6 7 8   When I press Right_Alt+apostrophe, it outputs 5 but Right_Alt+a and Right_Alt+Right_Windows give 1 (both when right alt is pressed and when it isn't) which is not what I wanted.  My current keyboard layout is us(alt-intl) and the right alt is apparently set up to act as AltGr / Iso_Level3_Shift. The output of xmodmap -pm is the following:  xmodmap:  up to 4 keys per modifier, (keycodes in parentheses):  shift       Shift_L (0x32),  Shift_R (0x3e) lock        Caps_Lock (0x42) control     Control_L (0x25),  Control_R (0x69) mod1        Alt_L (0x40),  Meta_L (0xcd) mod2        Num_Lock (0x4d) mod3       mod4        Super_L (0x85),  Super_R (0x86),  Super_L (0xce),  Hyper_L (0xcf) mod5        ISO_Level3_Shift (0x5c),  Mode_switch (0xcb) Existence of a Pivot Point in Euclidean Geometry In geometry there is a term called a pivot point. There exists a pivot point 'P' in the interior of a convex polyhedron in a euclidean space if and only if every single line through 'P' contains exactly zero or two vertices of the polyhedron.  I asked one of my professors, but he gave me a very narrow example of a cube, but I want to know the maximum number of pivot points that exist in a polyhedron. Can someone please help me prove how many exist? Interior of cartesian product is cartesian product of interiors I have to prove that:  $$Int(A\times B) = Int(A)\times Int(B)$$  Where $A\subset M$ and $B\subset N$, both $M$ and $N$ metric spaces.  The problem is that the exercise does not specify the metric, so I need to try to prove it using a generic metric.  If $x\in Int(A\times B)$, then an open ball can be centered at $(x,y)$ such that it is contained in $A\times B$. Therefore, this open ball, $B((x,y),r)\subset A\times B$. It means that $d((x,y),a)&lt;r$ for any $a\in A\times B$ for some $r&gt;0$. I guess that if I can take from here that $d(x,a)&lt;r$ and $d(y,a)&lt;r$ I can prove thhat $Int(A\times B)\subset Int(A)\times Int(B)$, but I still have to prove the other way around.   Any ideas? ... but still be required for applications that need admin privilegies?  In order to allow the following:  $ apache2ctl restart httpd not running, trying to start (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs  $ sudo !! sudo apache2ctl restart             #no password asked $                                   #works!   For reference I've seen this setup on amazon's e3 instances  Any idea? Could anybody clear it to me whether these two sentence are grammatically equal? If not, what is the difference?     1) They must use some methods...    2) They are to use some methods... Which video editor can I use to make clips to upload? I am looking for an easy video editor for Ubuntu 12.04. My needs are simple: make clips and upload them on sites (cut segments from a video file with frame to frame precision, convert into common formats, resize the file).  Can anyone suggest one? Single word to denote date and time I want one word that means Date and Time. For example in "the date and time of the event will be announced later" I want to use single word instead of "date and time" I've found in Wikipedia the formula for calculating an individual row in Pascal's Triangle: $$v_c = v_{c-1}\left(\frac{r-c}{c}\right).$$ where $r = \mathrm{row}+1$, $c$ is the column starting from $0$ on left and $v_0 = 1$.  Now, I've tried to do by hand and it works,  but I don't understand how to find this magic formula when I don't have access to Wikipedia...:) Conjugate to $\cos z$ is not equal to $\cos z$ conjugate $\overline{\cos(z)}\neq\cos(\overline{z})$ I have a dilemma. I have a task where I'm supposed to show that $|\cos z|^2+|\sin z|^2=1$ if and only if $z\in \mathbb{R} $. In my argument I have that $$\cos z\cdot\overline{\cos z} + \sin z\cdot\overline{\sin z}=\cos z\cdot \cos\overline{z} + \sin z\cdot \sin\overline{z}$$ but my teacher said that $\overline {\cos z} \neq \cos \overline{z}$.  Is this true?  But $$\overline{\cos(z)} = \overline{\frac{e^{iz}+e^{-iz}}{2}}=\frac{e^{-i\overline{z}}+e^{i\overline{z}}}{2}=\cos(\overline{z})$$ Why using IN(...) when selecting on indexed fields, will kill the performance of SELECT query?