Playfair's axiom (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Playfair's axiom" in English language version.

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archive.org

Playfair 1846, p. 29 Playfair, John (1846). Elements of Geometry. W. E. Dean.
Heath 1956, Vol. 1, p. 190 Heath, Thomas L. (1956). The Thirteen Books of Euclid's Elements ([Facsimile. Original publication: Cambridge University Press, 1908] 2nd ed.). New York: Dover Publications.
Heath 1956, Vol. 1, p. 220 Heath, Thomas L. (1956). The Thirteen Books of Euclid's Elements ([Facsimile. Original publication: Cambridge University Press, 1908] 2nd ed.). New York: Dover Publications.
Playfair 1846, p. 11 Playfair, John (1846). Elements of Geometry. W. E. Dean.
Playfair 1846, p. 291 Playfair, John (1846). Elements of Geometry. W. E. Dean.
George Phillips (1826) Elements of Geometry (containing the first six books of Euclid), p. 3, Baldwin, Cradock, and Joy
The proof may be found in Heath 1956, Vol. 1, p. 313 Heath, Thomas L. (1956). The Thirteen Books of Euclid's Elements ([Facsimile. Original publication: Cambridge University Press, 1908] 2nd ed.). New York: Dover Publications.
Heath 1956, Vol. 1, p. 314 Heath, Thomas L. (1956). The Thirteen Books of Euclid's Elements ([Facsimile. Original publication: Cambridge University Press, 1908] 2nd ed.). New York: Dover Publications.

arxiv.org

Brown, Elizabeth T.; Castner, Emily; Davis, Stephen; O’Shea, Edwin; Seryozhenkov, Edouard; Vargas, A. J. (2019-08-01). "On the equivalence of Playfair's axiom to the parallel postulate". Journal of Geometry. 110 (2): 42. arXiv:1903.05233. doi:10.1007/s00022-019-0496-9. ISSN 1420-8997.

clarku.edu

aleph0.clarku.edu

Euclid's elements, Book I, definition 23

doi.org

Brown, Elizabeth T.; Castner, Emily; Davis, Stephen; O’Shea, Edwin; Seryozhenkov, Edouard; Vargas, A. J. (2019-08-01). "On the equivalence of Playfair's axiom to the parallel postulate". Journal of Geometry. 110 (2): 42. arXiv:1903.05233. doi:10.1007/s00022-019-0496-9. ISSN 1420-8997.

worldcat.org

search.worldcat.org

Brown, Elizabeth T.; Castner, Emily; Davis, Stephen; O’Shea, Edwin; Seryozhenkov, Edouard; Vargas, A. J. (2019-08-01). "On the equivalence of Playfair's axiom to the parallel postulate". Journal of Geometry. 110 (2): 42. arXiv:1903.05233. doi:10.1007/s00022-019-0496-9. ISSN 1420-8997.