Finding all roots of a function within an interval
About multi-root search in Mathematica for transcendental equations
I'm working on a WordPress site for my band and I'd like to mark every 3rd post on our blog page to have a special class applied to it, anybody have any pointers on how to achieve this? Any help is very very appreciated, thanks! rock n roll. WMI object to get current sessions with client name? Is there way to enable more than 4 GB RAM in 32-bit Windows OS? I upgraded my PC to 4 GB RAM and I get only 3 GB. Windows 7 32-Bit consider that I've 4 GB RAM but didn't use more than 3 GB.  Someone told me that MS Windows 32-bit doesn't support RAM larger than 3 GB.  So please is there any way to make my OS "Windows 7 32-Bit" support more than 3 GB RAM ?  *`Note: I can't move to 64-bit because I've many program doesn't work with a 64-bit OS.  Edit::  I tried what Mr. Wonsungi advised me but whenever I check this option:      Enable support for 4 GB of RAM   I get the following error:      'Cannot access to the registry key   HKEY_CLASSES_ROOT\CLSID\{E88DCCE0-11d1-A9F0-00AA0060FA31}.'   There is no "CLSID" in my registry, I don't know why!. Given $\int_0^{\infty}e^{-x^2}dx = \frac{\sqrt{\pi}}{2}$, evaluate $\int_0^{\infty}e^{-a^2x^2-\frac{b^2}{x^2}}dx $ Given $$\int_0^{\infty}e^{-x^2}dx = \frac{\sqrt{\pi}}{2}$$ evaluate:   $$\int_0^{\infty}e^{-a^2x^2-\frac{b^2}{x^2}}dx. $$   I can find that  $$\left(ax+\frac{b}{x}\right)^2 = a^2x^2+2ab+\frac{b^2}{x^2}$$  therefore: $$\int_0^{\infty}e^{-a^2x^2-\frac{b^2}{x^2}}dx = e^{2ab}\int_0^{\infty}e^{-\left(ax+\frac{b}{x}\right)^2}dx$$  but I can't find any clue then. How will a particle with energy less than $V_{\rm min}$ behave? I'm doing some architectural cleanup that involves moving a bunch of classes into different projects and/or namespaces. Currently I'm moving the files by hand, building, and then manually adding using Foo statements as needed to resolve compilation errors. Anyone know of a smarter way of doing this? (We're a CodeRush and Refactor! shop, but I'd be interested to hear if Resharper has support for this) Book set underground everyone lives in pods woman wants to see her son Can anyone help me identify this book please? I read a book in the 80s about a woman living underground in a pod. Everyone had a big tv which gave them news etc (but it was starting to go wrong) and their food was delivered direct to their pod.  They weren't allowed to go to the earth surface as it was supposedly contaminated (post-war?). She gets a message from her son on the other side of the world and she takes the tube train from outside her pod and then some sort of aircraft to see him and eventually gets onto the surface of the earth and breathes the air and meets free people. The number of different ways to choose $k$ out of $n$ unique items The number of different ways to choose $k$ out of $n$ unique items:   Without repetition and without order-significance: $\binom{n}{k}=\frac{n!}{k!(n-k)!}$ Without repetition and with order-significance: $\binom{n}{k}\times k!=\frac{n!}{(n-k)!}$ With repetition and with order-significance: $n^k$ With repetition and without order-significance: $?$   Thank you! Passing named arguments to shell scripts Is there any easy way to pass (receive) named parameters to a shell script?  For example,   my_script -p_out '/some/path' -arg_1 '5'   And inside my_script.sh receive them as:  # I believe this notation does not work, but is there anything close to it? p_out=$ARGUMENTS['p_out'] arg1=$ARGUMENTS['arg_1']  printf "The Argument p_out is %s" "$p_out" printf "The Argument arg_1 is %s" "$arg1"   Is this possible in Bash or Zsh? su options - running command as another user I was wondering how to run a command as another user from a script.  I have the script's owner set as root. I also have the following command being run within the script to run the command as the hudson user:  su -c command hudson   Is this the correct syntax? How to change Ubuntu 18.04 system fonts? I installed Ubuntu 18.04, and I want to customize the fonts. I have already change all the setting by tweak tool. But the system default font not be changed, is anything I need to do? How do I convert a hex string to an int in Python?   I may have it as "0xffff" or just "ffff". Where is the icon used in this dialogue box? Where on my disk can I find the icon used in this dialogue box in OS X？    It may be Security.icns in OS X 10.7.3    I cannot find it in:   /System/Library/CoreServices/CoreTypes/Contents/Resources There are only LockedIcon.icns and UnlockedIcon.icns in this folder who looks like the icon in the dialogue box,the size of the icon in the dialogue box is 128x128px, but LockedIcon.icns and UnlockedIcon.icns is 32x32px.   lockedIcon.icns    So they are not the same icon.   /System/Library/CoreServices/Finder.app/Contents/Resources/ /System/Library/CoreServices/Problem Reporter.app/Contents/Resources /Applications/System Preferences.app/Contents/Resources /Applications/Utilities/Keychain Access.app/Contents/Resources /System/Library/CoreServices/Certificate Assistant.app/Contents/Resources/ I've got Ubuntu 10.10 installed to use my whole hard-disk, but would like to use the 130GB of free space I've got to create a new partition and do some development on Unity and Natty.  Can I use gparted to do this?  If so how? I have 2 hard disks, on first I have installed win xp. I boot into xp and run setup of win7 and installed it on second hard disk. Now the problem is that win7 bootloader is installed on first harddisk, so if I remove the first harddisk, I cannot boot into win7.   How I can move / install bootloader of win7 on second hard disk? Can a probability distribution value exceeding 1 be OK? In the 1960s I read book--an older children's book, I think--which I loved, and still remember, roughly.  I have no idea what the title is or who the author is, and I'm wondering if anyone knows this one:  Scientists had invented a device which they didn't fully understand, and which had puzzling effects.  For example, when a pencil was put into the machine, it disappeared, and then reappeared inside out: The lead was on the outside.  When people went into the machine, they came back dead, having died from fright.  Finally they sent a very open-minded person into the machine.  She was an artist, I think.  She was able to return alive, and described an alternate universe in which geometry was very different.  I distinctly remember that there were supposedly square triangles or four-sided triangles--or was it three-sided squares?  (This is, of course, a literally contradictory claim, but I didn't see the matter as clearly then.)  Thanks! Continuity of function mapping connected set to connected set How do I create a list of Python lambdas (in a list comprehension/for loop)? I want to create a list of lambda objects from a list of constants in Python; for instance:  listOfNumbers = [1,2,3,4,5] square = lambda x: x * x listOfLambdas = [lambda: square(i) for i in listOfNumbers]   This will create a list of lambda objects, however, when I run them:  for f in listOfLambdas:     print f(),   I would expect that it would print  1 4 9 16 25   Instead, it prints:  25 25 25 25 25   It seems as though the lambdas have all been given the wrong parameter. Have I done something wrong, and is there a way to fix it? I'm in Python 2.4 I think.  EDIT: a bit more of trying things and such came up with this:  listOfLambdas = [] for num in listOfNumbers:     action = lambda: square(num)     listOfLambdas.append(action)     print action()   Prints the expected squares from 1 to 25, but then using the earlier print statement:  for f in listOfLambdas:     print f(),   still gives me all 25s. How did the existing lambda objects change between those two print calls?  Related question: How gently could a comet/asteroid/meteorite “hit” Earth?