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A125628
Version of sexagesimal expansion of 2*Pi given by the Persian mathematician Al-Kashi in the 15th Century.
2
6, 16, 59, 28, 1, 34, 51, 46, 14, 50
OFFSET
1,1
COMMENTS
The last digit is rounded up from 49, 55 (cf. A091649). - Georg Fischer, Aug 04 2021
REFERENCES
Mohammad K. Azarian, Al-Risala al-Muhitiyya: A Summary, Missouri Journal of Mathematical Sciences, Vol. 22, No. 2, 2010, pp. 64-85.
Mohammad K. Azarian, The Introduction of Al-Risala al-Muhitiyya: An English Translation, International Journal of Pure and Applied Mathematics, Vol. 57, No. 6, 2009 , pp. 903-914.
Mohammad K. Azarian, Al-Kashi's Fundamental Theorem, International Journal of Pure and Applied Mathematics, Vol. 14, No. 4, 2004, pp. 499-509. Mathematical Reviews, MR2005b:01021 (01A30), February 2005, p. 919. Zentralblatt MATH, Zbl 1059.01005.
Mohammad K. Azarian, Meftah al-hesab: A Summary, MJMS, Vol. 12, No. 2, Spring 2000, pp. 75-95. Mathematical Reviews, MR 1 764 526. Zentralblatt MATH, Zbl 1036.01002.
Mohammad K. Azarian, A Summary of Mathematical Works of Ghiyath ud-din Jamshid Kashani, Journal of Recreational Mathematics, Vol. 29(1), pp. 32-42, 1998.
EXAMPLE
2*Pi ~= 6; 16, 59, 28, 1, 34, 51, 46, 14, 50.
CROSSREFS
Cf. A159991. - Reinhard Zumkeller, May 02 2009
Sequence in context: A163302 A223028 A091649 * A078672 A219817 A120795
KEYWORD
nonn,base,fini,full
AUTHOR
Mohammad K. Azarian, Apr 08 2008
STATUS
approved