The Pigeon hole problem. If k+1 objects are placed in k containers then one container must contain at least 2 objects Obviously!
Pigeonhole Principle,Cardinality,Countability
Combinatorics
Statistics Sections
Fundamentals of computational geometry M. Ramanathan STTP CAD 2011.
Feb 20111 Polygon Triangulation Shmuel Wimer Bar Ilan Univ., School of Engineering.
Chapter 5 Counting
