Title
Herbrand's theorem and non-Euclidean geometry
Abstract
We use Herbrand's theorem to give a new proof that Euclid's parallel axiom is not derivable from the other axioms of first-order Euclidean geometry. Previous proofs involve constructing models of non-Euclidean geometry. This proof uses a very old and basic theorem of logic together with some simple properties of ruler-and-compass constructions to give a short, simple, and intuitively appealing proof.
Year
DOI
Venue
2015
10.1017/bsl.2015.6
BULLETIN OF SYMBOLIC LOGIC
Keywords
Field
DocType
geometry,Tarski,Euclid,Herbrand's theorem,parallel postulate
Discrete mathematics,Non-Euclidean geometry,Algebra,Point–line–plane postulate,Automated theorem proving,Absolute geometry,Pure mathematics,Herbrand's theorem,Mathematical proof,Euclidean geometry,Foundations of geometry,Mathematics
Journal
Volume
Issue
ISSN
21
2
1079-8986
Citations 
PageRank 
References 
1
0.37
1
Authors
3
Name
Order
Citations
PageRank
Michael Beeson1224.09
pierre boutry210.37
Julien Narboux313012.49