============================== Bar-Ilan Combinatorics Seminar ============================== The next meeting of the seminar this year will take place, IYH, on (when) Tuesday, 17 Kislev (Nov. 27) refreshments at 11:45, talk at 12:00 noon (where) Room 331 (Math Dept Seminar Room), Math and CS Building (216), Bar-Ilan University (who) Zur Izhakian (Bar-Ilan University and Univ. Paris 6) will talk about (what) "Extended tropical algebra - basic notions" Abstract: --------- Tropical mathematics is a mathematics over the idempotent semiring (R,+,max), the real numbers equipped with the operations of maximum and summation - addition and multiplication respectively. The objective of the talk is to introduce the fundamentals of algebras defined over the extended tropical semiring - a new structure of a semiring that generalizes the former one. Despite our objects are typically combinatorial, and the ground structure is a semiring, yet, much of the classical results in real commutative algebra are carried over this structure -- matrix algebra is our main example. Forthcoming Events ================== * 24 Kislev (Dec. 4) Malka Schaps (Bar-Ilan University): "The combinatorics of spin representations of the symmetric and * 2 Tevet (Dec. 11) TBA ************************************************************************* You are all invited ! (Graduate students especially welcome) If you want to give a talk at the seminar, or know a prospective speaker, please contact Ron Adin . Seminar's homepage: see *************************************************************************