Proof by contradiction (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Proof by contradiction" in English language version.

refsWebsite

Global rank English rank

4doi.org

2^nd place

3clarku.edu

6,602^nd place

6,109^th place

2web.archive.org

1^st place

1edc.org

low place

1britannica.com

40^th place

58^th place

1ncatlab.org

low place

8,775^th place

1vcu.edu

7,721^st place

4,593^rd place

1andrej.com

low place

1stanford.edu

179^th place

183^rd place

1uni-goettingen.de

2,594^th place

2,546^th place

1utah.edu

2,446^th place

1,661^st place

1mathforum.org

low place

1ctan.org

low place

9,970^th place

1ualberta.ca

3,600^th place

2,528^th place

andrej.com (Global: low place; English: low place)

math.andrej.com

Bauer, Andrej (29 March 2010). "Proof of negation and proof by contradiction". Mathematics and Computation. Retrieved 26 October 2021.

britannica.com (Global: 40^th place; English: 58^th place)

"Reductio ad absurdum | logic". Encyclopedia Britannica. Retrieved 25 October 2019.

clarku.edu (Global: 6,602^nd place; English: 6,109^th place)

mathcs.clarku.edu

"Euclid's Elements, Book 6, Proposition 1". Retrieved 2 October 2022.
"Euclid's Elements, Book 9, Proposition 20". Retrieved 2 October 2022.

aleph0.clarku.edu

"Euclid's Elements, Book 7, Proposition 33". Retrieved 2 October 2022.

ctan.org (Global: low place; English: 9,970^th place)

The Comprehensive LaTeX Symbol List, pg. 20. http://www.ctan.org/tex-archive/info/symbols/comprehensive/symbols-a4.pdf

doi.org (Global: 2^nd place; English: 2^nd place)

doi.org

Hilbert, David (1893). "Ueber die vollen Invariantensysteme". Mathematische Annalen. 42 (3): 313–373. doi:10.1007/BF01444162.
Bauer, Andrej (2017). "Five stages of accepting constructive mathematics". Bulletin of the American Mathematical Society. 54 (3): 481–498. doi:10.1090/bull/1556.
"Linear Resolution", From Logic to Logic Programming, The MIT Press, pp. 93–120, 1994, doi:10.7551/mitpress/3133.003.0007, ISBN 978-0-262-28847-7, retrieved 21 December 2023

dx.doi.org

"Linear Resolution", From Logic to Logic Programming, The MIT Press, pp. 93–120, 1994, doi:10.7551/mitpress/3133.003.0007, ISBN 978-0-262-28847-7, retrieved 21 December 2023

edc.org (Global: low place; English: low place)

www2.edc.org

"Proof By Contradiction". www2.edc.org. Retrieved 12 June 2023.

mathforum.org (Global: low place; English: low place)

"Math Forum Discussions".

ncatlab.org (Global: low place; English: 8,775^th place)

"Proof by contradiction". nLab. Retrieved 7 October 2022.

stanford.edu (Global: 179^th place; English: 183^rd place)

plato.stanford.edu

Moschovakis, Joan (2024), Zalta, Edward N.; Nodelman, Uri (eds.), "Intuitionistic Logic", The Stanford Encyclopedia of Philosophy (Summer 2024 ed.), Metaphysics Research Lab, Stanford University, retrieved 5 April 2025

ualberta.ca (Global: 3,600^th place; English: 2,528^th place)

math.ualberta.ca

G. H. Hardy, A Mathematician's Apology; Cambridge University Press, 1992. ISBN 9780521427067. PDF p.19 Archived 2021-02-16 at the Wayback Machine.

uni-goettingen.de (Global: 2,594^th place; English: 2,546^th place)

resolver.sub.uni-goettingen.de

Hilbert, David (1893). "Ueber die vollen Invariantensysteme". Mathematische Annalen. 42 (3): 313–373. doi:10.1007/BF01444162.

utah.edu (Global: 2,446^th place; English: 1,661^st place)

math.utah.edu

Alfeld, Peter (16 August 1996). "Why is the square root of 2 irrational?". Understanding Mathematics, a study guide. Department of Mathematics, University of Utah. Retrieved 6 February 2013.

vcu.edu (Global: 7,721^st place; English: 4,593^rd place)

people.vcu.edu

Richard Hammack, Book of Proof, 3rd edition, 2022, ISBN 978-0-9894721-2-8; see "Chapter 9: Disproof".

web.archive.org (Global: 1^st place; English: 1^st place)

Gary Hardegree, Introduction to Modal Logic, Chapter 2, pg. II–2. https://web.archive.org/web/20110607061046/http://people.umass.edu/gmhwww/511/pdf/c02.pdf
G. H. Hardy, A Mathematician's Apology; Cambridge University Press, 1992. ISBN 9780521427067. PDF p.19 Archived 2021-02-16 at the Wayback Machine.

Proof by contradiction (English Wikipedia)

andrej.com (Global: low place; English: low place)

math.andrej.com

britannica.com (Global: 40th place; English: 58th place)

clarku.edu (Global: 6,602nd place; English: 6,109th place)

mathcs.clarku.edu

aleph0.clarku.edu

ctan.org (Global: low place; English: 9,970th place)

doi.org (Global: 2nd place; English: 2nd place)

doi.org

dx.doi.org

edc.org (Global: low place; English: low place)

www2.edc.org

mathforum.org (Global: low place; English: low place)

ncatlab.org (Global: low place; English: 8,775th place)

stanford.edu (Global: 179th place; English: 183rd place)

plato.stanford.edu

ualberta.ca (Global: 3,600th place; English: 2,528th place)

math.ualberta.ca

uni-goettingen.de (Global: 2,594th place; English: 2,546th place)

resolver.sub.uni-goettingen.de

utah.edu (Global: 2,446th place; English: 1,661st place)

math.utah.edu

vcu.edu (Global: 7,721st place; English: 4,593rd place)

people.vcu.edu

web.archive.org (Global: 1st place; English: 1st place)

britannica.com (Global: 40^th place; English: 58^th place)

clarku.edu (Global: 6,602^nd place; English: 6,109^th place)

ctan.org (Global: low place; English: 9,970^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

ncatlab.org (Global: low place; English: 8,775^th place)

stanford.edu (Global: 179^th place; English: 183^rd place)

ualberta.ca (Global: 3,600^th place; English: 2,528^th place)

uni-goettingen.de (Global: 2,594^th place; English: 2,546^th place)

utah.edu (Global: 2,446^th place; English: 1,661^st place)

vcu.edu (Global: 7,721^st place; English: 4,593^rd place)

web.archive.org (Global: 1^st place; English: 1^st place)