Empty set (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Empty set" in English language version.

refsWebsite

Global rank English rank

6^th place

6^th place

513^th place

537^th place

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491^st place

311^th place

239^th place

1classicalrealanalysis.info

low place

low place

2,120^th place

1,328^th place

archive.org

Rudin, Walter (1976). Principles of Mathematical Analysis (3rd ed.). McGraw-Hill. p. 300. ISBN 007054235X.
David M. Bloom (1979). Linear Algebra and Geometry. pp. 45. ISBN 0521293243.

bu.edu

math.bu.edu

A. Kanamori, "The Empty Set, the Singleton, and the Ordered Pair", p.275. Bulletin of Symbolic Logic vol. 9, no. 3, (2003). Accessed 21 August 2023.

classicalrealanalysis.info

Bruckner, A.N., Bruckner, J.B., and Thomson, B.S. (2008). Elementary Real Analysis, 2nd edition, p. 9.

tripod.com

jeff560.tripod.com

"Earliest Uses of Symbols of Set Theory and Logic".

unicode.org

"Unicode Standard 5.2" (PDF).

wolfram.com

mathworld.wolfram.com

Weisstein, Eric W. "Empty Set". mathworld.wolfram.com. Retrieved 2020-08-11.