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

2archive.org

6^th place

1wolfram.com

513^th place

537^th place

1tripod.com

549^th place

491^st place

1unicode.org

311^th place

239^th place

1classicalrealanalysis.info

low place

1bu.edu

2,120^th place

1,328^th place

archive.org (Global: 6^th place; English: 6^th place)

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 (Global: 2,120^th place; English: 1,328^th place)

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 (Global: low place; English: low place)

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

tripod.com (Global: 549^th place; English: 491^st place)

jeff560.tripod.com

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

unicode.org (Global: 311^th place; English: 239^th place)

"Unicode Standard 5.2" (PDF).

wolfram.com (Global: 513^th place; English: 537^th place)

mathworld.wolfram.com

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

Empty set (English Wikipedia)

archive.org (Global: 6th place; English: 6th place)

bu.edu (Global: 2,120th place; English: 1,328th place)