Richard Delaware
My Mathematics Genealogy,
and My Erdös Number
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Mathematics Genealogy Trees
The year listed is the year the Ph.D. was awarded.
Tree 1: By major advisors:
- 1665 Mencke, Otto
- 1685 Wichmannshausen, Johann
- 1713 Hausen, Christian
- 1739 Kaestner, Abraham
- 1786 Pfaff, Johann
- 1799 Gauss, C. F.
- 1812 Gerling, Christian
- 1824 Plücker, Julius
- 1868 Klein, C. Felix
- 1873 Lindemann, C. L. Ferdinand
- 1885 Hilbert, David
- 1911 Steinhaus, Hugo
- 1921 Rajchman, Aleksander
- 1923 Zygmund, Antoni
- 1954 Waterman, Daniel
- 1966 Solomon, Donald
- 1973 Foran, James
- 2000 Delaware, Richard
Tree 2: By major advisors up to Klein,
then again major advisors
above Klein's second advisor, Lipschitz:
- 1650 Weigel, Erhard
- 1666 Leibniz, Gottfried
- ----- Bernoulli, Jacob
- 1694 Bernoulli, Johann
- 1726 Euler, Leonhard
- ----- Lagrange, Joseph L.
- ----- Poisson, Simeon
- 1827 Dirichlet, Gustav
- 1853 Lipschitz, Rudolf
- 1868 Klein, C. Felix
- 1873 Lindemann, C. L. Ferdinand
- 1885 Hilbert, David
- 1911 Steinhaus, Hugo
- 1921 Rajchman, Aleksander
- 1923 Zygmund, Antoni
- 1954 Waterman, Daniel
- 1966 Solomon, Donald
- 1973 Foran, James
- 2000 Delaware, Richard
Data obtained from The Mathematics Genealogy Project.
[Last updated here: 6 May 2005.]
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My Erdös Number is 4
My Links:
- 2001 (only link)
R. Delaware and L. Eifler
Graphs of Functions, Regular Sets and s-Straight Sets
Real Analysis Exchange, 26(2), 2000/2001, pp. 885-892, MR 1844402.
- 1971 (only link)
L. Q. Eifler, K. B. Reid, and D. P. Roselle
Sequences with Adjacent Elements Unequal
Aequationes Mathematicae, 6, 1971, pp. 256-262, MR 0295921.
- 1975 (earliest of 4 links)
Marcel Herzog and K. B. Reid
Numbers of Factors in k-Cycle Decompositions of Permutations
Combinatorial Mathematics, IV (Proceedings of the Fourth Australian Conference, Univ. Adelaide, 1975), pp. 123-131;
Lecture Notes in Mathematics, 560, Springer, Berlin, 1976, MR 0419572.
- 1970 (earliest link)
Paul Erdös and Marcel Herzog
An Extremal Problem on the Set of Noncoprime Divisors of a Number
Israel Journal of Mathematics, 8, 1970, pp. 408-412, MR 0274413.
The Distribution of Erdös Numbers [updated 6 May 2005]
Erdös number 0 --- 1 person (Erdös himself!)
Erdös number 1 --- 504 people
Erdös number 2 --- 6593 people
Erdös number 3 --- 33605 people
Erdös number 4 --- 83642 people
Erdös number 5 --- 87760 people
Erdös number 6 --- 40014 people
Erdös number 7 --- 11591 people
Erdös number 8 --- 3146 people
Erdös number 9 --- 819 people
Erdös number 10 -- 244 people
Erdös number 11 -- 68 people
Erdös number 12 -- 23 people
Erdös number 13 -- 5 people
Erdös number 14 -- 0 people
Data obtained from The Erdös Number Project, and MathSciNet.
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