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Author Topic:   What is it called
Geordie
Super Geek

Posts: 161
From: Fairfax Station, VA, USA
Registered: Nov 2001

posted March 12, 2002 14:27     Click Here to See the Profile for Geordie   Click Here to Email Geordie     Edit/Delete Message   Reply w/Quote
I have given up all hope. What is the name for the therefore (Unicode 61532 or back slash in the symbol font) symbol? You know the one that is three dots in the shape of a triangle. One of my coworkers says it stands for a greek phrase, but I can't find anything on it. At this point I am starting to think that Johann Rahn just made it up in Teusche Algebra.

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EngrBohn
Highlie

Posts: 709
From: United States
Registered: Jul 2000

posted March 12, 2002 14:54     Click Here to See the Profile for EngrBohn   Click Here to Email EngrBohn     Edit/Delete Message   Reply w/Quote
LaTeX just calls it
code:
\therefore

It may not *have* a real name.

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ConfusedGeek
unregistered
posted March 12, 2002 16:08           Edit/Delete Message   Reply w/Quote
Are you sure thats the right #?
according to www.unicode.org char 0x2234 is the THEREFORE symbol (3 dots in triangle pointed up)

61532 (0xF05C) is in the reserved range

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Geordie
Super Geek

Posts: 161
From: Fairfax Station, VA, USA
Registered: Nov 2001

posted March 13, 2002 05:18     Click Here to See the Profile for Geordie   Click Here to Email Geordie     Edit/Delete Message   Reply w/Quote
You are right about the Unicode numbering. The number I gave was what MS Word said the characters Unicode number was. I should have known to double check that.

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The Pope of Perl
Geek Apprentice

Posts: 42
From: Terra
Registered: Feb 2002

posted March 13, 2002 18:25     Click Here to See the Profile for The Pope of Perl   Click Here to Email The Pope of Perl     Edit/Delete Message   Reply w/Quote
Well, here's all I could find about it:

According to http://mail.mcjh.kl.edu.tw/~chenkwn/mathword/set.html "The therefore symbol was first published in 1659 in the original German edition of Teusche Algebra by Johann Rahn (1622-1676) (Cajori vol. 1, page 212, and vol 2., page 282)."

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GameMaster
Geek

Posts: 93
From: State of insanity
Registered: Mar 2002

posted March 16, 2002 01:38     Click Here to See the Profile for GameMaster   Click Here to Email GameMaster     Edit/Delete Message   Reply w/Quote
It's actually from logic, too. It is the "conclution thingy," oh wait that is just what I call it... sorry.

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Evilbunny
Highlie

Posts: 645
From: A Calculus book near you...
Registered: Nov 2001

posted April 04, 2002 19:19     Click Here to See the Profile for Evilbunny   Click Here to Email Evilbunny     Edit/Delete Message   Reply w/Quote
It means "therefore" or in conclusion! It is used at the end of proofs. Now what does Q.E.D. mean? I completely forgot! help!

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EngrBohn
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Posts: 709
From: United States
Registered: Jul 2000

posted April 05, 2002 05:19     Click Here to See the Profile for EngrBohn   Click Here to Email EngrBohn     Edit/Delete Message   Reply w/Quote
Quod Erat Demonstrandum

(though, I personally prefer "Quite Easily Done")

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spungo
Alpha Geek

Posts: 270
From: Hell's toilet
Registered: Jan 2002

posted April 05, 2002 05:29     Click Here to See the Profile for spungo   Click Here to Email spungo     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by EngrBohn:
Quod Erat Demonstrandum

(though, I personally prefer "Quite Easily Done")


It sort of means...'that proves the thing that we set out to prove.' Not quite the same as 'therefore'. 'Therefore' implies a single logical step - QED implies an argument - a series of steps.

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kyle_beatty
Geek Apprentice

Posts: 41
From:
Registered: Apr 2000

posted April 05, 2002 13:02     Click Here to See the Profile for kyle_beatty   Click Here to Email kyle_beatty     Edit/Delete Message   Reply w/Quote
Wouldn't
code:
/therefore

mean the same as Latin ergo

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supaboy
SuperBlabberMouth!

Posts: 1250
From: Columbia, SC, USA
Registered: Jan 2000

posted April 05, 2002 16:11     Click Here to See the Profile for supaboy   Click Here to Email supaboy     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Evilbunny:
Now what does Q.E.D. mean? I completely forgot! help!

A fine man told me it stood for quantum electrodynamics.

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