Editing Tuple (section)

==Sources==
* {{citation|first1=John P.|last1=D'Angelo|first2=Douglas B.|last2=West|title=Mathematical Thinking/Problem-Solving and Proofs|year=2000|edition=2nd|publisher=Prentice-Hall|isbn=978-0-13-014412-6}}
* [[Keith Devlin]], ''The Joy of Sets''. Springer Verlag, 2nd ed., 1993, {{isbn|0-387-94094-4}}, pp. 7–8
* [[Abraham Adolf Fraenkel]], [[Yehoshua Bar-Hillel]], [[Azriel Lévy]], ''[https://books.google.com/books?id=ah2bwOwc06MC Foundations of school Set Theory]'', Elsevier Studies in Logic Vol. 67, 2nd Edition, revised, 1973, {{isbn|0-7204-2270-1}}, p. 33
* [[Gaisi Takeuti]], W. M. Zaring, ''Introduction to Axiomatic Set Theory'', Springer [[Graduate Texts in Mathematics|GTM]] 1, 1971, {{isbn|978-0-387-90024-7}}, p. 14
* George J. Tourlakis, ''[https://books.google.com/books?as_isbn=9780521753746 Lecture Notes in Logic and Set Theory. Volume 2: Set Theory]'', Cambridge University Press, 2003, {{isbn|978-0-521-75374-6}}, pp. 182–193