radical operator

What is the sign for a radical?

http://media.amw.com/multimedia/fileRepository/db/472/202/sign_enlg.jpg

http://img158.imageshack.us/i/peacefulmuslims3may20067sg.jpg/

http://www.sullivan-county.com/immigration/shahed.jpg

http://profile.ak.fbcdn.net/object3/631/22/n36178167126_8195.jpg

http://multimedia.jta.org/images/multimedia/radical-jewish-settlers22_0/IMG_1746_m.jpg

http://zombietime.com/gaza_war_protest/IMG_0231.JPG

http://tnjn.com/content/storyimage/2007/09/17/DSCF2820.box.JPG

Oh and also sqrt()

There's me, trying my damnedest to resist a similar response... :D


http://profile.ak.fbcdn.net/object3/631/22/n36178167126_8195.jpg

Where do some of these people learn, (or not, in this case), to spell. :D

Yeah... but I guess I can see the struggle. You start with "L".... ok, so far so good. Lyyyy... Lyyyy... must be a Y. Now you have "LY".... well shoot nothing looks right after "LY".... Lyyyaaaaa, Lyyyyaaaa... You are so stuck, once you fell into that whole "LY" pitfall! May as well go with an "E"! From here on out it's a breeze to end with "R". "LYER". Bravo, mister speller man!

(That one wasn't really an actual sign but when it popped up in bing image search I couldn't help but include it)

Thanks guys, lol.