Variable (mathematics) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Variable (mathematics)" in English language version.

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10archive.org

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

Beckenbach, Edwin F (1982). College algebra (5th ed.). Wadsworth. ISBN 0-534-01007-5. A variable is a symbol representing an unspecified element of a given set.
Landin, Joseph (1989). An Introduction to Algebraic Structures. New York: Dover Publications. p. 204. ISBN 0-486-65940-2. A variable is a symbol that holds a place for constants.
Boyer, Carl B. (Carl Benjamin) (1991). A History of Mathematics. New York: Wiley. ISBN 978-0-471-54397-8.
A History of Greek Mathematics: From Aristarchus to Diophantus. By Sir Thomas Little Heath. Pg 456
A History of Greek Mathematics: From Aristarchus to Diophantus. By Sir Thomas Little Heath. Pg 458
Fraleigh 1989, p. 276. Fraleigh, John B. (1989). A First Course in Abstract Algebra (4th ed.). United States: Addison-Wesley. ISBN 978-0-201-52821-3.
Edwards 1892, pp. 1-2, Article 4, "Constants and Variables" "It has become conventional to make use of the letters a, b, c , ..., α, β, γ, ..., from the beginning of the alphabet to denote constants; and to retain later letters, such as u, v, w, x, y, z and the Greek letters ξ, η, ζ for variables." Edwards, Joseph (1892). An Elementary Treatise on the Differential Calculus (2nd ed.). London: MacMillan and Co.
Foerster 2006, p. 18. Foerster, Paul A. (2006). Algebra and Trigonometry: Functions and Applications (classics ed.). Upper Saddle River, NJ: Prentice Hall. ISBN 978-0-13-165711-3.
Edwards 1892, pp. 2, Article 5, "Dependent and Independent Variables" Edwards, Joseph (1892). An Elementary Treatise on the Differential Calculus (2nd ed.). London: MacMillan and Co.
Edwards 1892, pp. 2-3, Articles 6-7, "Functions" Edwards, Joseph (1892). An Elementary Treatise on the Differential Calculus (2nd ed.). London: MacMillan and Co.

books.google.com (Global: 3^rd place; English: 3^rd place)

Tabak 2014, p. 40. Tabak, John (2014). Algebra: Sets, Symbols, and the Language of Thought. Infobase Publishing. ISBN 978-0-8160-6875-3.
Sorell 2000, p. 19. Sorell, Tom (2000). Descartes: A Very Short Introduction. New York: Oxford University Press. ISBN 978-0-19-285409-4.
Scientific American. Munn & Company. September 3, 1887. p. 148.
Hosch 2010, p. 71. Hosch, William L., ed. (2010). The Britannica Guide to Algebra and Trigonometry. Britannica Educational Publishing. ISBN 978-1-61530-219-2.

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

van Dalen, Dirk (2008). Logic and Structure (PDF) (4th ed.). Springer-Verlag. p. 57. doi:10.1007/978-3-540-85108-0. ISBN 978-3-540-20879-2.

encyclopediaofmath.org (Global: 3,863^rd place; English: 2,637^th place)

Sobolev, S.K. (originator). "Individual variable". Encyclopedia of Mathematics. Springer. ISBN 1402006098. Retrieved September 5, 2024. A symbol of a formal language used to denote an arbitrary element (individual) in the structure described by this language.

loc.gov (Global: 70^th place; English: 63^rd place)

lccn.loc.gov

Feys, Robert; Fitch, Frederic Brenton (1969). Dictionary of symbols of mathematical logic. Amsterdam: North-Holland Pub. Co. LCCN 67030883.

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

plato.stanford.edu

Shapiro, Stewart; Kouri Kissel, Teresa (2024), "Classical Logic", in Zalta, Edward N.; Nodelman, Uri (eds.), The Stanford Encyclopedia of Philosophy (Spring 2024 ed.), Metaphysics Research Lab, Stanford University, retrieved September 1, 2024

ufpe.br (Global: low place; English: low place)

cin.ufpe.br

van Dalen, Dirk (2008). Logic and Structure (PDF) (4th ed.). Springer-Verlag. p. 57. doi:10.1007/978-3-540-85108-0. ISBN 978-3-540-20879-2.

uky.edu (Global: 3,273^rd place; English: 2,108^th place)

ms.uky.edu

Diophantine Equations. Submitted by: Aaron Zerhusen, Chris Rakes, & Shasta Meece. MA 330-002. Dr. Carl Eberhart. 16 February 1999.

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

"ISO 80000-2:2019". Quantities and units, Part 2: Mathematics. International Organization for Standardization. Archived from the original on October 7, 2024. Retrieved September 15, 2019.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
Margherita, Barile. "Sigma". mathworld.wolfram.com. Archived from the original on March 28, 2025. Retrieved October 14, 2025.

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

mathworld.wolfram.com

Margherita, Barile. "Sigma". mathworld.wolfram.com. Archived from the original on March 28, 2025. Retrieved October 14, 2025.

Variable (mathematics) (English Wikipedia)

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

books.google.com (Global: 3rd place; English: 3rd place)

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

encyclopediaofmath.org (Global: 3,863rd place; English: 2,637th place)

loc.gov (Global: 70th place; English: 63rd place)