Gian-Carlo Rota
He worked on the theory of incidence algebras (which generalize the 19th-century theory of Möbius inversion) and popularized their study among combinatorialists, set the umbral calculus on a rigorous foundation, unified the theory of Sheffer sequences and polynomial sequences of binomial type, and worked on fundamental problems in probability theory.
http://en.wikipedia.org/wiki/Gian-Carlo_Rota

The Internet Gian Carlo Rota Polish Seminar

Getting started on 2008-12-16 by :a.k.kwaśniewski
the member of the Institute of Combinatorics and its Applications
as a Continuation of Gian Carlo Rota Polish Seminar

The Internet Gian Carlo Rota Polish Seminar Link Library

Seminar Articles

Seminar Affiliaded Articles

NEWS

links: Rota Memorial Conference
A. K. Kwaśniewski
M. Dziemiańczuk
 B.K. Kwaśniewski

Sylvester Night Mathemagics

[1] A. K. Kwaśniewski Ivan Bernoulli Series Universalissima, arXiv:math/0601016v1, [v1] Sun, 1 Jan 2006 05:51:45 GMT, Ganita Bharati vol. 28 No 1-2; (2006) 101- 109
[2] A. K. Kwaśniewski Graded posets zeta matrix formula arXiv:0901.0155v1, Thu, 1 Jan 2009 01:43:35 GMT

Seminar Themes

dates led by subjects
Feb, March 2009 A.K.Kwasniewski Subject 2 upside down notation
leitmotiv: Is the upside down notation efficiency - an indication? of a structure to be named?
Dec 2008
Jan 2009		 A.K.Kwasniewski Subject 1 oDAGs & KoDAGs in Company
leitmotiv: oDAGs stem from where and whence?