Bractals
2012-10-21 04:13:22 |
Geometry Notation
Is anybody familiar with the following notation?
P•Q•R denotes collinear points P, Q, and R
with point Q between points P and R. Clearly, R•Q•P
denotes the same thing. |
Bractals
2012-10-21 04:15:19 |
Re: Geometry Notation
I forgot to ask for a source if you are familiar. |
Jer
2012-10-21 23:50:12 |
Re: Geometry Notation
I've never seen it.
You could make P•Q•R be a link to a page that defines it. If you do this I would see no problem with using the notation in a problem
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brianjn
2012-10-22 01:25:59 |
Re: Geometry Notation
Jer makes a good point, particularly if you have the intention of using it repeatedly, otherwise define your notation as a Note and if you need it again then copy-paste or reference that Note of that problem.
I've done some lengthy Google Searches and not found anything.
Um. If you decide to create your own page definition may I suggest that it is within the very first comment of the thread definition.
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Bractals
2012-10-22 15:02:43 |
Re: Geometry Notation
I found it with a google search of "Hilbert's betweenness axioms". Except it uses asterisks instead of bullets. |
Jer
2012-10-23 13:01:32 |
Re: Geometry Notation
http://www.skidmore.edu/~mhuibreg/MA%20309/Fall%202008/Hilbert%27s%20Axioms.htm
is an example that uses it. B1. A*B*C implies A, B, C are distinct and collinear, and also C*B*A.
http://en.wikipedia.org/wiki/Hilbert%27s_axioms is the wikipedia article which avoids the notation:
If a point B is between points A and C, B is also between C and A, and there exists a line containing the points A,B,C.
I'd suggest avoiding the notation and just saying "collinear points P,Q,R with Q between P and R" or just "Q is on segment PR." |
