What symbol do you use for "contradiction"?

  • Topic Archived
You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
  1. Boards
  2. Maths Marathon
  3. What symbol do you use for "contradiction"?

User Info: Slime_Knight

6 years ago#1
We had a topic about which proof mark people use a while ago, and I was just looking at the common contradiction symbols used on http://en.wikipedia.org/wiki/Contradiction#Symbolic_representation . After doing a logic course I pretty much settled on "up tack" (http://www.fileformat.info/info/unicode/char/22a5/index.htm), probably mainly because it's easy to write.

User Info: Xshortguy007

6 years ago#2
I use the two implication arrows facing each other.

http://www.ccc.commnet.edu/grammar/ or www.dianahacker.com/rules

User Info: linkkhalid89

6 years ago#3
I've seen $\perp,\nleftrightarrow$, as well as two which don't show up in the LaTeX script. But I would use $\Rightarrow\Leftarrow$, although I just generally write "this is a contradiction."
To read the math in my posts, download https://addons.mozilla.org/en-US/firefox/addon/748 and http://www.gold-saucer.org/mathml/greasemonkey/.

User Info: PaulMalucciMD

6 years ago#4
Lightning bolt.
Rating of LOST S3E15 - 7/10
"Its only like the most awesome hour of television" - Hurley

User Info: Palex3

6 years ago#5
[This message was deleted at the request of the original poster]

User Info: Palex3

6 years ago#6

From: PaulMalucciMD | #004
Lightning bolt.

His Majesty, Palex the Third, Emperor of all the Canadas, has spoken. Go forth and spread the word.

User Info: Sir_Bahamut

6 years ago#7
If I'm writing down nicely and neatly I just write "contradiction" or "which gives the required contradiction" or something.

I've gotten quite fond of the lightning bolt for shorthand lately though
"You have to be 100% behind someone before you can stab them in the back" ~David Brent.

User Info: avsfan33

6 years ago#8
I just say it. I try to find a good balance between text and symbols.
Craig Anderson, our Lord and Saviour

User Info: Slime_Knight

6 years ago#9
I usually say it, but sometimes it's nice to have shorthand.

User Info: Appleframer

6 years ago#10
If I don't just say it, then I'll use the arrows:

-> <-
  1. Boards
  2. Maths Marathon
  3. What symbol do you use for "contradiction"?

Report Message

Terms of Use Violations:

Etiquette Issues:

Notes (optional; required for "Other"):
Add user to Ignore List after reporting

Topic Sticky

You are not allowed to request a sticky.

  • Topic Archived