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21. Catalan numbers - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/Extras/Catalan/

    7 Mar 2023: Parentheses: the number of ways in which parentheses can be placed in a sequence of numbers to be multiplied, two at a time. ... show). B Hayes, A Question of Numbers, American Scientist, January-February 1996.

22. Aleksandr Osipovich Gelfond (1906 - 1968) - Biography - MacTutor…

    https://mathshistory.st-andrews.ac.uk/Biographies/Gelfond/

    7 Mar 2023: of the history and the present state of the theory of transcendental numbers (1930). ... numbers and the history of mathematics.

23. Real numbers 1 - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/HistTopics/Real_numbers_1/

    10 Jul 2023: M Lopez Pellicer, Constructions of real numbers (Spanish), in History of mathematics in the XIXth century, Part 2 (Spanish), Madrid, 1993, Real Acad. ... Tidskr. 25/26 (2) (1978), 57-69; 111. M Pihl, The place of Theodoros in Plato's "Theaitetos" and the

24. Harriot and binary numbers - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/Extras/Harriot_binary_numbers/

    7 Mar 2023: On another page Harriot has six different examples of calculating with binary numbers. ... Try multiplying the binary numbers 11000011000 and 11001010101 using this last method of Harriot.

25. Perfect numbers - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/HistTopics/Perfect_numbers/

    7 Mar 2023: Jahrhundert, Nieuw Arch. Wisk. (4) 8 (2) (1990), 239-241. M Crubellier and J Sip, Looking for perfect numbers, History of Mathematics : History of Problems (Paris, 1997), 389-410. ... H S Uhler, A brief history of the investigations on Mersenne numbers

26. Jekuthiel Ginsburg (1889 - 1957) - Biography - MacTutor History of…

    https://mathshistory.st-andrews.ac.uk/Biographies/Ginsburg/

    27 Mar 2024: Some of Ginsburg's papers, published around 1930, are: Note on Stirling's Numbers (1928); On the Early History of the Decimal Point (1928); Napier on the Napier Rods (1929); and ... He published two books, both jointly authored with D E Smith: A History

27. Charles Méray (1835 - 1911) - Biography - MacTutor History of…

    https://mathshistory.st-andrews.ac.uk/Biographies/Meray/

    7 Mar 2023: P Djugak, The limit concept and irrational numbers: ideas of Charles Méray and Karl Weierstrass (Russian), Studies in the history of mathematics (Moscow, 1973),176-180. ... Histoire Sci. Appl. 23 (4) (1970), 333-350. M López Pellicer, Constructions of

28. Eight Squares Identity - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/Extras/Eight_Squares_Identity/

    7 Mar 2023: To see how this works let us look at multiplication of two complex numbers. (. ... quaternions while the eight squares identity corresponds to the multiplication of the Graves-Cayley Numbers.

29. Arabic numerals - MacTutor History of Mathematics

    https://mathshistory.st-andrews.ac.uk/HistTopics/Arabic_numerals/

    4 May 2024: show). G Ifrah, A universal history of numbers : From prehistory to the invention of the computer (London, 1998). ... L C Karpinski, The history of arithmetic (New York, 1965). K W Menninger, Number words and number symbols : A cultural history of

30. Hermann Hankel (1839 - 1873) - Biography - MacTutor History of…

    https://mathshistory.st-andrews.ac.uk/Biographies/Hankel/

    7 Mar 2023: Died. 29 August 1873. Schramberg (near Tübingen), Germany. Summary. Hermann Hankel was a German mathematician who worked on the theory of complex numbers, the theory of functions and the history of ... He worked on the theory of complex numbers, the