Euclid's sixth postulate

by chemistry1
Tags: euclid, postulate, sixth
chemistry1 is offline
Jul30-13, 08:43 PM
P: 93

Has anybody heard of Euclid's sixth postulate ? It says : Two lines do not contain a space.

I don't know why, but I'm only finding this postulate in my things, not anywhere else.... Help ? Thanks
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micromass is online now
Jul30-13, 08:48 PM
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I'm not an expert on Euclidean geometry, but I've never heard of it.

Where exactly did you encounter this?
chemistry1 is offline
Jul30-13, 08:50 PM
P: 93
Well, from this source :

I suppose you speak French, if you're Belgian ? (I think..)

jim mcnamara
jim mcnamara is offline
Jul30-13, 08:51 PM
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Euclid's sixth postulate

It is purely a modern invention
'Some modern treatments add a sixth postulate, the rigidity of the triangle, which can be used as an alternative to superposition.'

p 5. Coxeter, H.S.M. (1961). Introduction to Geometry. New York: Wiley.
chemistry1 is offline
Jul30-13, 08:53 PM
P: 93
Can someone give me insight on it ? Thank you.

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